If you are doing a case build, the gigabyte z87x-OC motherboard has 4 full pcie slots, with an extra pice-4pin power in the motherboard for added stability. Been rocking it a month and no problems so far.
And if you care i got
Case: Corsair 400R filled with fans
Ram: Forgot but it was some patriot 1600 8gb stick (single stick, because i had it so not running dual channel)
CPU: Intel G3420
PSU: Corsair RM850 (overkill but whatever got a good deal)
I got 4x MSI 750ti (non TF edition) which got a little better mhash than the Asus i tried, although the asus was powered... weird eehh