Wrong section, I guess.
But
The pc in the link given is quite decent. But as I'm not too familiar with the 7 series Nvidia cards, I can't really give a full approval.
The 560 TI isn't that bad either.. It can run the current games which are out easily + as the new year's coming up, Intel will probably introduce another bridge (starting with a 5) ( wont give my head for that fact) and AMD will make the 8xxx cards open for the public.
So I wouldn't really rush with buying one.
But for that budget, I would probably build one myself and for the AMd solution , but that's all up to you.