AMD 64 Alienware, definitely
The Alienwares are awesome, I was going to buy one for college next year, if I don't win a computer first, and I get enough scholarships to afford it
Actually Alienware computers are no more expensive for what you get then ABS, Falcon, or another high end gaming system. Plus they look freakin' awesome and have a nice cooling system.
AMD's are faster than Pentiums and much better for gaming. Thinking of a video card? If you have all the money, get the nVidia Geforce FX5950, otherwise go for the 5700.
nVidia and AMD are great gaming components to a computer. Go for the best if you have the money. If not, you can get a Barton 2800+ instead of a 64 bit one.
Good luck
Xander - Bolt Software
Why do the antagonists always have to look so cool?