Sorry I haven't answered this till now.
You haven't bought anything yet, have you?
If you haven't, and you can wait just a little while longer, Haswell, Intel's new CPU architecture, launches June 4. With an investment this big, it's always best to get the newest stuff that you can, and getting the newest Intel CPU is a big deal. It shouldn't be any more expensive than Ivy Bridge is now.
Motherboard: You pretty much can't go wrong with either ASUS or Gigabyte.
As far as a power supply is concerned, you really should get one that's made by Seasonic. Channel Well (CWT), who makes that Thermaltake, is certainly OK, but Seasonic is better. If you're going to spend $100 on a PSU, do yourself a favor get a Seasonic. 650 watts is plenty. Newegg has the Seasonic 660W 80Plus platinum on sale for $90 every once in a while, and I strongly recommend it. This database
will tell you who makes what.
Graphics card: Never buy a high-end graphics card. Not worth it, IMO. Get 2 mid-grade ones and SLI them together. The best ones to do this with are the GTX 660 and the new GTX 650 Ti BOOST. They are the best bang-for-the-buck option, and will save you as much as $200 over a GTX 680 and give similar performance. Just make sure they have at least a 2GB frame buffer per card. 1GB just doesn't cut it anymore. For reference, I'm still gaming on 2 GTX 460s that I bought new for about $62.50 apiece after rebate!
Sound card: Try using your motherboard's on-board sound chip before buying one. Chances are, it'll be good enough.
SSD: The Samsung 840 Pro is the best one on the market right now. It's on sale sometimes for $200, though this is really not a good time to be buying an SSD because prices are high right now.
RAM: At least DDR3 1600. 8GB should be plenty, unless you use software that requires more. Most people don't. Corsair, GSkill and Crucial are my usual go-to brands, though my latest has been Samsung.
EDIT: If you haven't yet, sign up for the Newegg newsletter to get their coupon codes. The AnandTech Bench
is also extremely useful in cases such as yours.