For what you're getting, I'd say that's a damn cheap price.
The question: Is there a performance difference between 4 gfxs cards in Quad-SLI as compared to just like 2 8700's in vanilla Dual-SLI mode? Or does it work out like using a RAID-0 where the data just moves a little faster and your harddrive really isn't doubled in actuality?
Who do I have to screw to get this? [hardware]
sli just about doubles performance, and quad sli doesnt do much more than triple due to driver problems, bandwidth limits, no game being able to challenge it, and so on, little things add up, only professionaly built quadsli configs like the renegade and the one from alienware can really pull off about 4times performance