None of them from what I can see.
None of the rigs in there have anything in the way of decent graphics cards, the most I saw was a GT630 and A4 APU graphics.
You wont find a gaming machine there.
^ Portugese, cant exactly order parts off an American website.
I advise you build your own rig. That website doesnt really offer any gaming oriented builds, and the only one that is suitable for gaming is well above you budget.
It has a GTX660 which is a pretty good gaming card. It's outside your budget so my suggestions to build your own PC for much cheaper or Just save some more until you can afford this, but I strongly suggest you build your own.