I am about to buy a laptop. I have narrowed it down to nearly the same models made by Acer. One comes with a P8600(2.40GHz) with a GeForce 9600M 512mb GS, 16'' screen, and ddr2 ram. The other comes with a T6400(2.00GHz), Geforce 9600M GT 1gb, drr3 3, and a whopping 18.4" screen. I am going to be doing some mild gaming, a little bit of coding, and web browsing. The 2nd is 20 dollars more. I was wondering if the faster processor is worth the drawbacks. Also, is it possible to replace video cards in laptops? Thanks!