Swap the graphics card for this.
http://www.overclockers.co.uk/showproduct.php?prodid=GX-273-MS&groupid=701&catid=56&subcat=1752
If so the OP will need to up the PSU as that lightning takes 2x 8-pin and 1x 6-pin PCIE connectors - something like the EVGA Supernova 750W will do, and should still be cheaper as the savings will outweigh the cost of the more expensive PSU, so good call But different PSU required