I don't have the knowledge to build y own, but I bought my dream machine from alienware instead of one of the major computer companies.
Sure, I paid a pretty penny for it, but I'm willing to do that for quality.
Here's what I got:
3 Yr on-site warranty with 24/7 phone tech support
Windows XP Home w/ service pack 2
480 watt power supply
P4 processor w/ HT technology 3.2 GHz
ASUS P4C800-E Deluxe - Intel 875P motherboard
2GB dual channel DDR PC-3200 SDRAM at 400MHz - 4 x 512 MB cards
ATI RADEON X800 PRO 256 MB DDR3 w/ digital and TV out
video cooling system with some fancy pants glowing fans
160 GB Barracuda 7200 RPM w/ 8MB cache hard drive
Lite-On 16xDVD / 52x32x52x CD-RW drive
Plextor PX-712A 12x DVD RW drive
good old fashioned 3.5" 1.44 MB floppy
Sound Blaster Audigy 2 ZS 7.1 high definition surround
Intel Gigabit Ethernet adapter
NEC 22" CRT flat screen
multimedia keyboard
Intellimouse 3.0
Works Suite
buncha other goodies that I picked out instead of having them foisted upon me by the company.
I'm sure some of you could easily build this for half what I paid, but I'm not a member of that group sadly. Besides, the system itself looks like sculpture. Should be at my house in about 2 weeks. I'm as giddy as my wife at a half-price shoe sale.
If you've never heard of the company before, check em out sometime at
www.alienware.com