AsAnAtheist :
First let them work out the scaling/stuttering from 4 way crossfire. But still 6 way crossfire, holy .. even 6x 3870s could be ridiculously formidable.
Why not just 3x 3870X2's?
Speaking of Hydra, according to some new info I read, it only supports GT200 and ATI 4000 series GPU combinations between vendors, which is a bit of a letdown...Hope that turns out the be false, but I had a feeling something like that might happen...