Which video card has the best performance? I'm thinking about upgrading from my old dell (which has the x1400) to this Newegg.com - ASUS G Series G1S-A1 NoteBook Intel Core 2 Duo T7500(2.20GHz) 15.4" Wide SXGA+ 2GB DDR2 667 160GB 5400rpm DVD Super Multi NVIDIA GeForce 8600M GT - Retail