What Gskill memory for asus P8Z77-V mobo

I considering GSKILL sniper or ripjawsX thats on sale at newegg and wanated to ask anyone with eperience with the asus P8Z77-V what would be a good match.For instance should I use 1600, 1866, or 2133. I do plan to OC the cpu.
Im building the following next week.

AsusP8Z77-V
Intel 3770k
EVGA Geforce 680
Noctua NH-D14
XFX 850 black edition PSU
NZXT M59 case
Xfi Fatil1ty gamer
Velocirapter 150G

8Gig GSKILL ???