I have the G.Skill. Seems like good memory and looks cool with the black PCB and Red heatsinks. Its really up to you though, which one you prefer.
Whats the warranty like with G.Skill ? Luckily ive never had to return any of my previous G.Skill memory. Its a shame we cant buy these anywhere..they obviously exist : The red stuff.
whichever is the cheapest or suits your color scheme (if that is something you do). Corsair and Gskill are both reputable manufacturers, they both make high quality sets. Personally, I like the corsairs best, but that should not really put any weight in your decision making process.
I went for the Crossair set because at the time there where a few bad customer reviews on different sites about the G.Skill sticks. But I do not know if there is actually any thing faulty with them.
cant fault the ripjaws x. i got two seperate 8gb sets working fine together at 2133, and managed to oc them to 2200 with no extra voltage, as well as lower the timings. brilliant ram