With new expansion approaching, i'd like to play WoW in Ultra settings. I'm usually running 5box teams, and 8box on occasions. I have i7 960 @ 3,2 GHz, Radeon HD5870, 6 GB RAM.

5 clients run fine at Low settings but when I go Medium or High i can feel PC starting to struggle, especially in crowded areas. I'd like to at least main window to run at max settings, don't care about slaves that much. Should I just buy new GFX or proccesor... or completely new rig?

Thanks in advance!