A Phanteks PH-TC14PE beats the H100 for cheaper, the mobo is a bit meh, 16GB of RAM is useless for anything expect for video editing/rendering, a 6870 is quite a low end card for a $1700 build, the monitors are overpriced and W7 ultimate is simply a waste of money.
I hope you overclock that cpu quite a bit, if you want to make use of that cooler, because I've heard good things about it. Then again it was the H60, but I guess the H100 can only be better, so don't take my word for it.
Why 16GB of RAM and why not an Ivy Bridge CPU? And for 1700 I would assume you could get a better GPU.
He would have been following what the hackintosh forums say are parts that work without doubt, but i see no reason for a 3570k not to, all the same, i doubt he will be gaming on this, more likely video rendering and such where the ram will actually come into use
6870 is very very very low end for this budget...