*Intel P4EE is better than the AMD64. Its just harder to get. If you can get the EE, then by all means, GET IT!
*try to get raid 0 array
ATI 9800XT
Audigy 2 Platinum ZS
Logitech Z-680s
Coolermaster Wave master
Gigabit Ethernet Card
The indiDVD multi-dvd format writer, and a cd-rw to do direct copies
2 (or 3) WD Raptors *yay for 10,000 RPMs) (get the bigger version)
Multi-memory card reader-thing
CRT - go for a good Sony Trinitron or Samsung (i think) Diamondtron
LCD - Something good. I heard Sharp ones were good. Bigger is better
Logictech MX Elite Duo (MX700 + Elite wireless kb)
That really fast Canon Printer (forget the name)
Some 1337 games
This is gonna cost you alot.
*I'll post more when I think of more
*On a side note, you may want to wait a bit until buying/building this computer. The new chip from intel is comming soon, and R400, and NV40 (i think) are comming soon. Wait till late feb/march to get a computer. You'll be a much happier man (or woman)