Grand Total With Some Combo Scrounging: $766.89, not including 55$ worth of MIR's
Now, the idea with this system was to have a computer which can handle almost anything thrown at it now, and be easy to upgrade in the future. The recent sellouts have left me with even more questions, however.
1. Opinions on decent cases, especially the others discounted with the mobo? The Antec used to be bundled with the mobo for 15$ off, so much for that...
A suitable VGA replacement for the sold out one? Fan looks like it might overclock better too.
3. Should I overclock immediately, or as necessary? Will it dramatically impact my component lifespan?
4. Better combo combo's that I may have missed?
5. Am I better off going with a 5770 then crossfiring it later when i have to, rather than 4890's, even with the lower (atleast thats my impression) performance?
6. Is the more upgradeable mobo and PSU worth the extra 60ish$?
Overall, you've got a very good build. The one change I would absolutely make is to get a Samsung Spinpoint F3 HDD. These are a lot faster than pretty much everything else besides SSDs. They might be sold out of the 500 GB on Newegg, but you should look for one other places.
The CPU/RAM combo above is the only one I've seen (I'm building something very similiar). I think it might be worth it to wait for the Antec case to come back into stock. The Case/PSU combo batuchka mentioned has a good case, but a slightly underpowered PSU if you're planning on Crossfiring.
The 4890 and 5770 are both really good GPUs. I don't think you can go wrong either way, but the 5770 will be current a little longer because of the DirectX 11 support.