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#1891
I was just about to make a few comments on your choice of CPU cooler and then I saw sygnus21's post... CPU cooler size and motherboard layouts are a big headache to the home PC builder, I know, I've been bitten by it many times...
However, I'm going on a different tangent though; I'd suggest go for the Dominator (you can't go wrong with Corsair), and try find a better CPU cooler. In fact, combining those two thoughts, Corsair had a self-contained water cooling unit (H50), I see they've just recently announced the H70... Smaller, more efficient, might be worth considering.
Anyway, back to the size issue: looking at the motherboard picture on Gigabyte's site, it seems your board has a similar layout to mine. You might be better off getting a taller caller with a side-facing fan. For example, I got the Zalman CNPS9700NT; if you're running an i7 930, you might be better off with a 9900, but essentially I'd suggest something of that shape. The Scythe Mugen 2 looks like a pretty good one (Mugen 2 Rev. B: Scythe EU GmbH).