What are your wants? Do you want an uber-1337 computer right now for bragging rights? Or do you want an excellent performing computer that you can upgrade for years to come?
For the former, you can get a Dual-Opteron Tyan Thunder board (300-400), 2 Opteron 285 Dual Core processors (about $2000 total and equal to 2 FX-60s), 4GB of nice RAM ($600 or so), 2 7900GTXs in SLi ($1000), and you still have 1k to blow on whatever you want
seriously though, here's what I would get:
Opteron 170 or Athlon FX-60 (Overclock to 3 GHz or above, get latter if you want to OC even higher than that on the unlocked FSB)
DFI Lanparty SLI-DR EXPERT
2GB Low Latency DDR600
2 7900GTXs in SLi
1KW Power supply
1*150GB Raptor+2*500GB 7.2k HDDs
Cooler Master Stacker w/water cooling
And you'd still have a bunch of $$ left over
For the former, you can get a Dual-Opteron Tyan Thunder board (300-400), 2 Opteron 285 Dual Core processors (about $2000 total and equal to 2 FX-60s), 4GB of nice RAM ($600 or so), 2 7900GTXs in SLi ($1000), and you still have 1k to blow on whatever you want
seriously though, here's what I would get:
Opteron 170 or Athlon FX-60 (Overclock to 3 GHz or above, get latter if you want to OC even higher than that on the unlocked FSB)
DFI Lanparty SLI-DR EXPERT
2GB Low Latency DDR600
2 7900GTXs in SLi
1KW Power supply
1*150GB Raptor+2*500GB 7.2k HDDs
Cooler Master Stacker w/water cooling
And you'd still have a bunch of $$ left over