Soccerchamp: also, why use a 64-bit processor, you aren't going to take advantage of it, don't waste the money.
Also, IDE drives? NO NO NO. SCSI man, thats where it's at. Use multiple 15,000 rpm SCSI drives, but don't use IDE. Also, the hot swappableness of SCSI is purely a delight.
And one more thing, MS can't seem to get their 32bit version of WinXP working 100%, but now you're wanting to use the 64bit version? bleh
Use Linux..
www.debian.org