well its ur decision,
if ur gunna spend more money on a mobo with 2 more useless pci-e 2.0 then thats fine with me.
but seriously maybe buying one more 4870x2's are alrite to me
but rly... dont spend more money on the gigabyte :\
The gigabyte is great mine died after a few minutes (not the fault of gigabyte or myself).
It as great ocing features like the others do and the board come water cooling ready.
That asus Rampage looks promising as well.