Depends on how you use your computer. Photoshop and some intensive games like BF2 really love 2GB, while others like Source prefer a fast CPU. If you do media encoding/conversion or video editing you might prefer the CPU.
Well.. I plays alot. I use the computer for games and be on the internet . I play games like BF2, Doom 3, BFME II, Fear, Prey and games like that. No source games..