Is this for gaming? I'm guessing so because of the two HD5970s.
You can build that system for about half the price if you build it yourself (or pay someone to put it together for you).
- The CPU is far too high-spec'd. It's the same CPU as an i7 930, just clocked higher. You can get to 3.23GHZ yourself (and further) with some basic overclocking and a semi-decent air cooler.
i7 930 = $300
i7 970 = $800
- A single HD5970 can play pretty much any game out right now, at full graphics at 1080p. There's really no reason to get a second one now. If you get to a point where it starts to struggle with games, you can buy it then for probably half the price it is now.
- 6GB is plenty, even for gamers. You'll struggle to even make use of 4GB with gaming. The only reason to ever get more than 6GB is if you're going to be using multiple VMs or heavy, heavy processing. If you ever do find yourself needing more RAM, you can buy it then
- Instead of getting two 10k drives and raiding them, invest in a high-quality SSD. You'll get what is probably better performance, in a simpler, quieter setup. The best way to do it is to follow the usual model of putting your OS+programs on the SSD, and then getting a separate hard drive for storage - for example a decent 1TB - on which you should put your music, games, video, image of the OS on the SSD, etc.
Considering you have a very large budget, I can throw a build together for you on Newegg, if you'd like?