DDR3, which ram should I pick?

[Treekodar]

I'm at a loss right now because I'm not quite sure which ram I should choose. I've been looking at the following:

OCZ Platinum DDR3 1600 running at 7-7-7-24 with a voltage of 1.65V. It's a 6 GB kit(3x2 GB).

Corsair Dominator DDR3 1600 running at 7-7-7-20 with a voltage of 1.65V, which is also a 6 GB kit.

Which should I choose? I'm getting an i7 920(which I'm going to OC).

 

[Treekodar]

Okay, but I'm not quite sure what to look at when I'm buying RAM. Is a 7-7-7-20 @ 1600 better than a 7-7-7-24 @ 1600, or should I be looking at something else?