Okay...
fx57
DFI Sli board
4 gigs ram
15,000rpm 320mb/s SCSI harddrives in raid
dual 21"s
of course get some insane cooling setup and Lain-Li case
best x-fi sound card with some nice 5.1 or 7.1 speakers
either 2 GTX's or 1800's, or wait for nvidias response, all will be great.
That should peak around 7g.