I have a question about my choice of graphics cards. My specs are
-AMD Athlon X2 (1.9Ghz dual core)
-1GB Memory (Planning to make it 2gb)
-ATI Radeon 3650 1GB
-350W Ultra Power Supply

Basically, I'd like to know which graphics card I should get to run on my power supply. Would something like a 9800GT or an HD 4850 be fine? What would my bottleneck be concerning the limits of my specs?