Buy Starcraft 2 Mac
This game is partially CPU dependent but you really need a decent video graphics card. I got a GeForce 8600 GTS with 256MB and I can barely run on medium for decent performance. HDstarcraft on YouTube did a product review of the GTX 460. I think it costs around $200 last time I checked. I read 768MB version is good value, while 1GB costs more with negligible performance benefit.
buy starcraft 2 mac