first of all

First Timer.
the rig itself is good and would be alright for a couple of years of good gaming, out of interest which games are you playing or planning to play on the rig itself?
I also have to agree with Aragorn and suggest a cheaper card like this
http://www.ebuyer.com/product/244474 and invest in either more ram or SSD for OS drive and depending on the size of SSD put some of the most played games on it.
---------- Post added at 12:53 ---------- Previous post was at 12:51 ----------
okay change of mind go with the 6870 and get a water cooling block for the I5...
http://www.ebuyer.com/product/234187