My old graphics card(ATi Radeon x2600 series) died on me, so I was forced to get a new one, and now this is my rig:
CPU: Intel Core2 Quad CPU Q6600 @ 2.40GHz
ATi Radeon 5770 HD
I just played a test game after updating drivers to ensure everything works, and I can play SC2 on Ultra settings for everything! (Thanks for FragKrag for card recommendation). I'm so damn happy at the moment, and I just had to share =]. My old card was fried for over a week now, so I haven't had my game fix lately. Perfect timing for the weekend as well.
edit: I am getting my upload speed increased from 512kb/s to 1mb/s soon, so I will be able to stream in just as high quality as anyone else, so I'm super stoked for that as well, make sure to tune in! I'll be streaming SPL/OSL/MSL/etc still, but in much better quality, as well as my ultra settings of SC2! I'm current ranked #10 in my platinum division and I play Terran, so hopefully that will be something to look forward too as well.