Facepalm (sorry, don't mean this in a harsh way).
Haswell ONLY adds on-chip VRM (which still needs its own motherboard input VRM) and beefier on-board graphics. Both of these are useless to system builders.
As well, the 700 series is literally the 600 series (except for the 780, but that's basically an underpowered Titan). The 770 will be the 680, the 760ti the 670, and so on.
The ONLY advantage I can think of is that it'll lower 600 series prices (but people will still be stupid and buy a 770 instead of a 680) and the coolers on the stock 700 series will be slightly better. If you weren't planning to do a full WC loop (and on your budget I wouldn't) you'd have gone with a better GFX cooler (such as the Sig2). Even if you do go with the stock cooler (which wouldn't be a big deal at all, your temps would probably be fine either way), the 760ti stock probably won't be that much better than the 670 stock.
In summary, there is NO need to wait for Haswell. I could MAYBE understand waiting for the 700 series, but it really isn't that necessary.
Pushing all of that aside, assuming you will wait for Haswell and the 700 series (fair enough), your current setup still won't work; Haswell is on the 1150 socket and you'll have to change your MB when an 1150 comes out.
Also, just my
here, but if you're only buying one GFX card, you could probably go with a smaller, cheaper MB, like Micro-ATX or even M-ITX (if you're planning to add a second card in the future, M-ATX is still fine with two slots). Then again, you're gonna have to wait for Haswell compatible motherboards to come out anyway so you might as well wait and see what your options are in a month.
Also, 1866mhz memory isn't really necessary.
Oh, just realized you're planning to SLI later. In that case (no pun intended) go with some M-ATX Haswell board and the Corsair 350D. Awesome case. Or one of Fractal's several M-ATX cases. Or the TJ08-E.
If the PSU has the right connectors for two 770s (so probably 2 6pin 2 8pin), 750w will be plenty.
This entire build is sort of heavily based on assumption, though, because you don't have any idea what changes Nvidia will make to the 680 when they market it as the 770 and you don't know what motherboards will be available the months following the Haswell release. Basically you're doing a lot of waiting and planning is a little futile.Edited by Sethris225 - 5/19/13 at 11:01am