I plan to purchase these parts early in the week and my range is $1500-2000 USD including monitor.
Primarily this build will be for gaming with minimal need for video editing, zipping huge files over and over again for some reason, etc.
I don't need keyboard, mouse, speakers and I'm set on Windows 7 and I'm not worried about the monitor or optical drive either. I'm mostly concerned about the motherboard at this point but since is my first build I want to make my mistakes in my theoretical build before I'm putting everything together.
I prefer newegg and I'm in the purchasing from the US.
I already purchased this WD HDD and definitely want the 6G/s SATA. I plan to run a RAID 5 eventually but not for another 10-12 months.
I'm a little conflicted between the following two cards. Overall I've read in forums that the Sapphire generally preforms better but XFX has way better support (also the price difference). And I do plan to crossfire getting another 5850 in 8-14 months from now.
The HD 5850 Toxic edition uses the Vapor-X cooler and is factory overclocked, I'd go for it if you plan to push it further, otherwise the XFX version is decent enough. As for your PSU, if you want to go for three way CFX possibly in the future, I suggest a TX950W PSU instead. Otherwise that HX850W is good enough. As for a case - go for the HAF 922.
such a waist of money. really get i7 930 6 gigs of ram 1 5870 and spinpoint f3 not the crap you have.(no offense) the 6 core really isn't any better than a 4 core. need tri channel ram for i7 930. The motherboard you have picked out now will cost the same as cheap 1366 board. you want to leave crossfire as an option for the future, don't do it now. Finally spinpoint f3 is best bang for buck and has been shown time and time again to be very reliable.
For two 5850s you only need a good 650W PSU. And you could easily do three on an 850W PSU.
From the reviews I read the 1090T wasn't really the best choice for gaming, especially as it wasn't better than the much cheaper 955/965.
I know this is quite expensive, but it is the case that I plan to use for my next build atm, so I will throw it out there. LIAN LI ARMORSUIT PC-P50 $150 ($20 shipping). The Antec 900/902 would be a good choice tho.
For the video card I would go for a combination of large fan and low price.