get the Opteron 180, its about $710, which leaves $2280 for the rest of the computer which is great
WE start here:
DFI Lanparty UT Sli-DR $160 or something
Zalman CNPS9500 HSF $60
eVGA 7900GTX 512MB $500
WD Raptor X 150GBx2 total is $660
G.SKill 2x1GB DUal Channel $180
2x NEC 3550A $60 total
Creative X-Fi Xtreme $120
ASPIRE ATX-AS600W-GN 600W $90
Im a little unsure about the PSU, but if u want you can always get the Antec TruePower II 550Watt, its more than enough, its a great PSU, one of the best, i just thought i'd look for something else
Logitech Z-5500 5.1 Speakers $230
ALl those in total are $2060, but if u get the Antec PSU it will be about $2090. I'd suggest the Antec inplace of the Aspire since the Aspire doesnt have that many reviews.
OH i almost forgot, a CASE!
Thermaltake Silver Kandalf $230
+that its bout $2420 with the Antec.