Interestingly enough, pchardware had a shootout between the hyperx and the dominator and the hyperx did just as good or better. Of course i was more interested in hyperx vs. the nondominator corsair 1600 DDr3
I would pick the Corsair, simply because I have always used Corsair and know it to be very high quality. Kingston used to be the gold standard in memory (pre-2006), but now other companies such as OCZ, G.Skill and Corsair have taken over.
TBH, its all pretty much they same. I have ran just about every brand of memory and never had any issue with any. I run corsair 1600 and patriot 1600 right now. Still i prefer OCZ when given the choice.
Given a choice between just those 2 I would go with the Corsair. But I'm currently using OCZ in both of my i7 pc's and I was using Patriot in my old QX9650 pc.
I am running Dominators in my machine now, and Reapers in my HTPC. Both are great brands. I too prefer OCZ. Kingston is great memory and can definitely hold it's own with the other brands, it just tends to be a little more money for what you get.