About the Intels, like I said, they are BETTER or at least on the SAME level of the FX-8150/8350 when it comes to GAMING (A SINGLE INSTANCE OF THE GAME AT MAXIMUM SETTINGS), when it comes to multithreading, the FX wins over the other 2 Intels.
Bullcrap. All reviews state that whatever you do, the FX8350 is a bit slower than the 3470 and a lot slower than the 3570. Go read some.
AMD FX-8350 Vishera 8-Core CPU Review - HotHardware
AMD FX-8350 review | PC Gamer
and YES stock coolers ARE NOISY, you just can't say that a stock cooler (80mm fan at 5k+ RPM, it will run at 2-3k RPM while in IDLE, not while it's under 80%+ load and the CPU is burning, then it will start spinning as much as it can, high CPU usage on big CPUs, require a good cooler, no matter what you say here I just won't agree on anything else) will be silent, that's just impossible, as for the cooling, there are a lot of cheap and good coolers that will do the job. Temperatures? I think you miss the point here, Intels are WAY WAY WAY more hotter than an AMD, my FX is running at 43-46C under 80-90% load with a medium cooler, do I need to say more? While an Intel, will be at least 15C hotter...
Bullcrap again. My i5-2500K runs on stock cooler. On idle it runs at 2000RPM, on full load (as described earlier) it goes up to 3500RPM. You will never be able to hear it since the GPU cooler makes 10 times more noise. If you say it'll run 5k RPM you've obviously never used a stock cooler.
About the PSU, you miss a looooot of things about it, any system, above 350E would require at least 400W, like I said use Power Consumption Calculators, you will see for yourself..
I did use a calculator and as said; the i5 system I described comes in at 300W maximum power consumption. Oh, by the way, don't use the calculators of the PSU people, they have good reason to overrate your system. Use the independant ones and you'll see that there is no need for a big PSU.
ASUSTeK Computer Inc. -Support- Recommended Power Supply Wattage Calculator
but still a motherboard that costs 40-50E, I wouldn't go there ... at least for now

I can't give any real statement here, but I just won't trust such expensive system on a cheap mobo/psu.
Yeah, because we all know that more expensive means better... Oh, wait, that's not true! Quality comes from quality, not from money. Also; the only reason why it would be "such expensive system" is because you use expensive stuff that you don't need.
Overclocking can and will increase the number of bots that you can run, and yes it is true that it reduces the lifetime of the CPU (It won't run for 8 years, it will run for 5 years, do you care? I don't, you'll make the CPU money like 50 times by then)
As stated; Overclocking will also increase the cost of your system both in initial purchase cost (since you then indeed need a different cooler and PSU) and in operating (since you're using way more electricity).
Figure this:
Power consumption = clockspeed * voltage.
This means that the power consumption will logarithmically rise when you overclock a CPU.
Example:
A review of the overclocking abilities of the FX8350 gave the following results:
Stock: 4200 Mhz, power consumption (total system): 240W
Maximum overclock: 4700Mhz, power consumption (total system): 334W
(compare: Power consumption of a Corei5 system, same GPU, RAM, HDD, etx: 141W)
That means that between a normal Corei5 and an overclocked FX8350 there's almost 200W difference! Over here in the Netherlands that means a difference in electricity bill alone of 5 cents per hour (or 146 euros per year assuming 8 hours per day). And that doesn't even include the extra price of cooling and the heavier PSU (another 100 euros). Assuming a lifespan of 1 year, you can spend 250 euros more on the Corei5 system (which would upgrade the CPU to a Corei7 and beat the performance of the FX8350 hands *and pants* down).
AMD FX-8350 Vishera 8-Core CPU Review - HotHardware
First, how do you exactly think that you are going to use the HDD from your Laptop on a Desktop PC? They are WAY different. Laptop HDDs are SLOW, it won't help you. For HDD like I said few posts ago, go for WD Black Caviar, they are very good and not expensive.
Although I don't agree with "WAY different" (since nowadays they have the exact same connectors) I do wholeheartedly agree that they are *NOT* the way to go. They are indeed deadly slow and will likely overheat in a situation like this, dieing at too young an age for a harddisk.
like I said the FX will run at 4200 MHz without any problem right out of the box. (After all that is GUARANTEED by AMD they advertise it as 3,6-4,2GHz)
That's because the CPU will clock itself to 4200Mhz automatically when it gets a heavy load. It's the stock speed, nothing special, not even called overclocking.
You need a GPU with a lot of memory like I mentioned already, it's important, just like the RAM, mine is Palit GTX 560 TI 2GB 256 bit, a single instance of wow (with minimum resolution 300x200 or something like that) takes about 60MB of its memory, so if you want to run 20x WoWs and assuming that your graphics card needs the same amount of memory to run WoW at this resolution, you would need 1,2GB of Memory on the GPU to run the 20x WoWs, my GPU costs around 250E (or at least that's the price that I bought it at, back in July)
Bullcrap. The memory on your Graphics Card (not the GPU; the GPU doesn't have any memory except for it's own cache which is still measured in single digit MBs) is used to build up the screen and to hold textures. Whether you run 1 WoW or 20, the amount of texture memory is the same. The memory needed to build up the screen is quite unimportant as well since it need only draw what is visible and what will be visible. Memory management on graphics cards is so different from main RAM memory management that you can't compare it at all. There is no possible situation where graphics card RAM is more important than GPU speed or main RAM.
120-200GB SSD would be more than enough for you (ASSUMING THAT YOUR WINDOWS IS NOT ON THE SSD), another option here is WD 10000 RPM VelociRaptor 250GB 64MB cache, it's as good as any other SSDs in this price range/quality, and it's mechanical.
180+ is enough as single drive with the OS on it. I use a 120GB myself and if I'd only bot WoW that would be enough (it would fit Windows + 1 WoW install, albeit barely)
I've used the Velociraptor before and it's an amazing harddisk. It's still a harddisk though. Performance isn't up to spec with the current generation of SSDs and it's performance peaks at sequential reads (large files). That's not necessarily what you need in gaming, especially when multitasking. Random reads are still, and always will be, the domain of SSDs.
Currently I have 120GB SSD that runs my OS and 500GB HDD, but I am not runing a lot of bots now, when I bought my PC I didn't have an HDD it was the SSD only and I was able to run 8+ Diablos without any problems from a single copy of the game while on HDD you would need a copy for each instance.
With this amount of bots, it's never a good idea to run off multiple copies. Running off 1 copy will make sure caching is optimized. Running off multiple copies is only useful if you spread the copies across multiple devices so that loading isn't limited to one device. Especially on harddisks I would advise strongly against multiple copies since the mechanical read process is your biggest bottleneck and multiple copies means more mechanical read time.