Watch the prices, they will fall soon as Nvidia fills the 600 series line up.
they already have the high end covered with the 680 and are rebadging 510 ,520, 410,420, as lower end 600 cards.
when they make a 670 or 660, you should be able to get a great deal on a 560Ti.
Or AMD might drop their prices first to compete, so just watch the prices while you save up the extra.