For gaming on a laptop, honestly, how much of a difference will it make. In most cases the price to go from 512 to 1gig is over $100. I'm just not sure of whats more important - I can get a GeForce 6600 128meg card with 1gig of ram or a Geforce 6800 256meg card with 512 ram for relativly the same price. For gaming and performance, which combo should I go with?