Laptop: build or buy

Hey guys, I am looking to get a laptop computer. I would like to build it at my house, but my homebuilding experience has bee limited to desktop PC’s. Is it that much harder to build a laptop, or would I have a decent chance of succeeding. I have my specs set on something similar to the Alienware Aurora mALX 19", but I would like to avoid the $5000 price tag. Here is my wish list:
· Core 2 Duo Processor (preferably something in the e6600 range)
· 7900 or 7600 GTX video card
· 2G of Ram
· 18-19” screen
· Windows XP (unless Vista is any better with games than what I have heard)
I realize that this is a lot to ask for, and I do not want to spend more on my laptop than my desktop (about $2600). I am thinking about shopping from Dell if I end up buying instead of building. I thought about Alienware’s products but there pretty pricey for not much gain in performance. If you have any suggestions on better places to go please share with me. Thanks

Bryant

Exact reason why I offer any hardware upgrades, or mods I come up with to my existing customers at my cost + shipping.

If you pay the piper, you shouldn't have a rat problem a year down the road.