What ram to get?

I suppose you could use any of them.
I would pick the Corsair. cas 9 is better than 11.
faster than 1600 speed does not buy you much.
Read this:http://www.anandtech.com/show/4503/sandy-bridge-memory-scaling-choosing-the-best-ddr3
Low profile, or even no heat spreaders like the samsung is ok. 1.5 v ram does not need any.
I see no benefit in low voltage ram.

You could save a whopping $1 with this g.skil ram:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231546&name=Desktop-Memory