I'm unsure about the power supply (I know I want 750 watts or more, Corsair brand, and modular, but I think 1050W might be overkill), the motherboard (I'm certain about the Z68 Chipset, but uncertain about whether the particular one I picked is the best), and my choice of video card (I'd pick either one of the MSI cards I listed and eventually add another one for SLI, or just wait until the NVidia GTX 600 series is announced). What do you guys think?
4) Still undecided about the GPU setup. Just a matter of ordering one of those GTX 580 cards and adding another one later for SLI, or waiting around for the GTX 600 series...or I can just take the 2GB MSI GTX 560 Ti SLI setup out of my current computer and use it in my new rig, until the GTX 600 cards prices are reasonable and the games of 2012/2013 actually demand them.
5) As far as motherboards/CPUs go, Ivy Bridge will be out fairly soon, so I could wait for that, but I don't have to worry too much, as the Z68 chipset will be compatible with Ivy Bridge.
Now that I think about it, I'm seriously considering actually going through with this purchase later this year or early next year once the Kepler cards and Ivy Bridge are announced/released.