I'm building a new [personal] computer, which will be heavily used for gaming, but also the normal day-to-day stuff. I'm trying to decide which processor(s) to buy for this new machine, and I'm torn between an AMD Athlon 64 FX-55 and Dual AMD Opteron 148s. I know Opterons are normally used in server applications. I would consider dual Athlon 64's, but I haven't been able to find a motherboard that supports dual socket 939 processors. Anyway, what are the pros and cons of each? From what I can tell, both support the same multimedia instruction (MMX, SSE, SSE2, 3DNow!, 3DNow!+), etc. So which route would be best?