Please DO NOT purchase the components unless you have ALL of the money ready to spend. If you do you'll very much regret that decision when you find out that you could have saved money/purchased more with the money you had. I know it's tempting, but in my opinion it's quite stupid. If parts are not working you won't be able to RMA after thirty days (correct?) and you'll have to send back to the manufacture.
Please, please, please take my advice and post back when you have the money for a new system spec. You'll get much more when prices drop and new hardware is released.