If you are comfortable with building your own, check some of these out for similar $$$$ http://www.newegg.com/Product/ComboBundleDetails.aspx?ItemList=Combo.441108
Comes with a 5830, more powerful PS, weaker CPU (i think??) but solid still, FANTASTIC cooling case (i have 1, 9 fans 23*c idle) http://www.newegg.com/Product/ComboBundleDetails.aspx?ItemList=Combo.441111
BEAST, a little more expensive but if you wanted you could probably sell one of the GPU's on ebay if you didnt want to xfire. Out of stock atm though =/
Edit: I'm sorry, I just realised I was probably no help. That is a good system but as others have stated, pre-fabed pc's usually have locked bios. It's no big deal though if you don't plan on OCing. Also, as others have stated, the 5770 is a decent card (I have one of these as well) but it will limit your game settings a bit. I scored just over 4300 on low with it so I ordered a 5830, which was right at my budget limit.
I don't want to sound like a fanboi of AMD based systems, but I feel you get more bang for your hard earned gil from AMD.
Let us know what you decide and good luck ^^ Edited, Jul 11th 2010 9:38pm by jhariya