This was built in Computer Specs 101:
ASUS A8R-MVP [RX200CF] ($95.99)
RAIDMAX xB ATX-528B Case ($22.50)
PowerColor 1900XT512OEM Radeon X1900XT 512MB ($479.00)
Maxtor DiamondMax10 300GB 16MB SATA3.0 NCQ ($125.00)
BenQ DQ60BK ($37.99)
Corsair XMX PC3200 2x1GB
[email protected] ($176.00 after $40.00 MIR)
Maxtor DiamondMax10 300GB 16MB SATA3.0 NCQ ($125.00)
Thermaltake Big Typhoon ($54.99)
OCz PowerStream 520ADJSLI [12V@33A] ($124.99 after $15.00 MIR)
Athlon 64 X2 4400+ [Toledo, Socket 939 Lidded OmPGA, 2200MHz, ADA4400DAA6CD] ($458.00)
SUBTOTAL: $1699.46
So you could easily upgrade a few of those things, like a 7900GTX if your prefer or a 4800+. Another hard drive to put in RAID.