why dont you give your two cents first !!!

post your current system specs and we can judge and or help with improvements.


but as a simple guideline.
I as many others here run this basic setup:

Q6600 quadcore 2.4Ghz (i run mine @3Ghz)
4+ gig ram (8 gig preferred to load all 5 wow's into ram)
8800GTX 756mb video or better (i still run this)
fast dedicated harddrive withouth windows on it. a SSD preferred.