If you want to go all out, get an SR-X with dual socket Xeons, that will give you some kick. Still, be aware that Xeons are still locked so no OC that you can write home about (only about 2 MHz on the base clock).
Still, 16 cores of pure power ought to be something!! Wait till Intel unlocks the Xeons!!
BIOS 0049 for the GA and RE Z77 boards.