128MB ATI® Mobility™ Radeon™ 9600 PRO TURBO

VS

128MB DDR NVIDIA® GeForceFX™ Go5650

So what card is best for games? I wan't to play games with the best graphic without no lagg at all. And I'm going to buy new Dell Inspiron 8600 with Pentium M 1.7 GHz and 1GB DRR RAM so then what graphic card I should choose? Please tell me negative and positive experienses, thanks for all the response I hope to get.