I would go for 1GBb - a jump from 256mb to 1GB - you'll be rocking. Look for a dual channel kit as well, at a nice speed. Evan at 512MB, it's pushing it, you'll get fed up with that one day.
Ive got 1GB, and I want more. But to go from 256MB to 1GB, will be nice.
Josh Rider> Please reduce sig. to 5 lines or less.