I don't know alot about building computers, but I gave it a try about 5 months ago, and I couldn't have made a better choice.
I was able to create a system that normaly would have cost around 2400 to buy, for only 1580. I searched the web and found sales, used instant rebates and bought components from Mwave, Newegg, PCclub (ick, but had the best price on a sale), Best Buy (same reason as PCclub), anywhere that I could reasonably trust that had the best price. I also tried to buy most items from somewhere I could go pick it up. Shipping is a hidden cost that can build up to a substantial amount. Took me about 3 weeks to get all the buying done. Saved around 900 over buying it pre-packaged. Time well spent.
I was really worried when it came down to building the system. One thing that I messed up on was posting the motherboard. Didn't know I need to do that. Luckaly I followed the directions and didn't over tighten the screws, so no damage was done (Thank Goodness). The directions are soo easy I was done in about 40 minutes. Up and running without a hitch.
I would suggest trying to build it yourself. You will save lots of money, you will know your machine inside and out, and have the pride of a job well done.
e6600 Core 2 Duo
Nvidia 7950 1 gig
2 gig Kingston HyperX Dual Channel Kit
19" LCD monitor
Asus P5N32-SLI PRE/WIFI-AP
Centurion 5 mid tower (kinda tight in this case, need to get a bigger one when I get the Nvidia 8800)
DVD Dual Double layer rewritable drive
Apex 600w powersupply
Sata 250 gig 16 meg 7200 hard drive
120 gig backup drive
Saitek illuminated keyboard
Some sorta gaming mouse.. forget what it is exactly
Assorted other things.... lights, fans
* Most of the items above have come down in cost... so I could probably get this same setup for even less now. Ah well
Shaftiel