Which chipset would you prefer if getting a new video card? My current machine is running a GeForce 256 meg. My wife is getting this machine, and I'm looking for a new card for it. I know I want 512 memory, but not familiar with all the DDR, GDDR3 speak. I'm inclined to go with another GeForce, since my current card has worked well. My previous card was a Radeon with 128 meg, which I remember working well to. Right now the Radeon seems to be more popular? Anything else I should know? TIA. Bucky.