lets be realistic, those laptops are out of most peoples budgets...try a desktop for the same price! You'll have scientists at your door waiting to run calculations. Even the $2000 (base) KN notebook is only running the 8600GS which is barely better than the 9800PRO I got many years ago.
The laptop listed by the original poster is very worth the price, a faster CPU would give it a better longevity. My 9800PRO was hardly breaking a sweat with my old Athlon 1700+XP.
You should check out Sager, they have a nice model with a 512mb 8600GT, throw on one of the faster CPUs, and you should be grinning wide at about $1400-1500. You could wait a bit for some good models to come out with 8700GT too, but you can always wait...might as well get something cheap and cheerful now and upgrade within a couple of years instead of blowing $3000-4000 and feeling obliged to use the same old technology for 5 years.
no offence KN guy but I dont see what your $2000 model has to offer vs a superior Sager machine for only $1400. Do let us know however if im mistaken about the performance. The parts are the-virtually- same 3rd party pieces, no manufacturing being done by either company besides gimmicky custimizations.
Bottom line: I think ya should go for the Dell