No offense but $1700 is ridiculous for a 2x5830 rig.
I have 2 4x5830 rigs and a 3x5830 rig and I would probably guess that the cost of all 3 put together w\ a total of 11 5830's was maybe 1700.
+1 $1700 is way too expensive for that machine. Should be $500-$600. I built my machines out with 5850/5830's for about $800/GH. Granted, I know those cards are hard to come by nowadays, but $1700, really?