I always bring this up when it isn't mentioned, but you gotta get 1.5v with that i5 or it won't work.
Aside from just being great RAM, G.Skill's RipjawsX series is specifically tailored for SandyBridge processors (how exactly, I don't know) which makes it all the better of a recommendation.
Heck, it shouldn't take any effort at all to overclock DDR3-1333 G.Skill RAM to DDR3-1600. I understand that you can OC the DDR3-1600 even higher, but for $25, I'm not entirely sure it's still worth it. Like I tell people, yes, the technical specifications do say that it should be faster, but once you use them side-by-side, you'll see that anything over a $30 difference in price will be better spend elsewhere, unless you're an extreme overclocker who will be pushing the limits of everything in your system.
Good luck with your massive amounts of new RAM.