Yeah, you can't really say one laptop is the best.
Sure you could have one with a super great, bright, hi res 17" screen, geforce 6800 ultra, the latest dothan, 2GB of ram, a 7200RPM 16MB 160GB harddrive, and a dvdrw driver, but it'll also be huge, weigh close to 10 pounds, and get less than an hour of battery life doing anything relatively intensive.
On the other hand, you could get a laptop with 7 and a half hours of battery life, weighs only 3.5 pounds, and is super compact.....but has a small screen, small slow harddrive, no disk drive, and integrated graphics that can't play most games.(GMA900 appears to be about geforce 3 level performance, except GMA900 supports dx9 instead of just dx8, and geforce3 can barely run dx8 stuff so anything dx9 on gma900 chugs)