I already have 1 out of the two gtx 560's and I am not willing to pay 1k for a graphics card
What I'm trying to say is, you have to buy a GPU that is future-proof. A GPU that will be able to handle for years and years to come.
A GTX 560 isn't one of those GPUs. It's outdated already.
Heck, even a Quadro 600 can humiliate it. And as far as I know, a Quadro 600 is far older than the GTX 560 and cheaper.