You'll get more out of say Mushkin Redline 1GB sticks (x4 if you insist on 4GB)Memory: TWINX2048-3200CS2 X 2 (4 gigs)
Well the EVGA KO edition is a better cardVideo Card: BFG Geforce 7800GTX SLI
Why not SCSI?Hard Drive: WD 250 GB 16 MB cache X 2
Plexy has a 740DVDRW: Plextor 716A

Litey Roms are superiorDVD: Sony DDU1615/B2s