So, I'm looking at doing an upgrade to my system to make my WoW performance a little better. Eventually I will be going Core i7 but for now I just need something to give me a little more power. Anyways, I get about 40-60fps in WoW with my settings in Good at 1680x1050 res with 4x AA. When I'm in the highest settings at 2x AA I average 10-16fps. I would like to increase my framerate and I'm just not sure what do upgrade. I have the Athlon X2 4400+ and a GeForce 8600GTS 256MB w/ 4GB RAM on Vista x64. Seeing as WoW doesn't seem to be very CPU intensive I was thinking about going with a new GPU maybe a EVGA GeForce 250 or so. Something less than $200. I just need some opinions. Is my CPU the bottleneck or the GPU?