I really like your build. Next time around, I will do the same.
1) As to ram, 1.5v is the norm, but 1.65 is the limit before you do permanent damage to your cpu.
It really is a moot point because the sandy bridge ram controllers are so good that there is minimal difference in real app performance or fps between 1600 ram and anything faster.
I suggest this kit of ddr3 1600 g.skil. The heat spreaders(which are largely useless) are not too tall.http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314
2) Will you use an aftermarket cooler? The stock Intel cooler is ok up to a point, but it gets noisy when it spins up under load. You will need a low profile cooler since the psu gets in the way of a tower type. SPCR used a Scythe Samurai ZZ coolerin their review:http://www.silentpcreview.com/lianli-pcq08
I love the red color, I used it in a V351 build.
3) I would agree with outlander-04 that a touch stronger psu would be a bit better. Look to Seasonic, XFX, Corsair, PC P&C, and Antec for quality units.
This time of year, you can get some good deals. A silver or gold rated efficient unit will be quieter. Also, I see your pic was modular. That is ok, but you will be using most of the leads anyway. I see modular as a plus, but not a requirement.