I have the 1kW version of that Corsair HX power supply cross... they are pretty bad ass. It's a Seasonic design, and definitely one of the best that you can buy.Looks like a solid build. You buying heavy duty thermal grease and all that? The only other thing I looked for on that mobo was that the realtek 889 chip supports DTS Connect/Dolby Live which encodes your games' 5.1-7.1 sound and outputs it over optical/coax/hdmi... It does, but I couldn't find any information on whether Gigabyte enabled the option, or provides the software to do it. Their audio driver package was like 70 some MB, so it may, but if it does not, you might want to consider adding a nice dedicated card for your audio experience so you can have 1-wire hookup for your audio and keep it digital.
Hey, when I looked at your mobo, I saw the smart response ssd option and having never heard of it, I thought I'd go read up. Did you ever think of getting an ssd to take advantage of this? it looks pretty damn cool and would allow you to speed up more than just your OS when configured.