It does give the impression of being aimed at getting performance from older CPU, perhaps at the expense of a slightly weak graphics card. I would recommend, at least, trying to squeeze budget to either GTX660, or HD7870. There's not a huge difference in performance between the two, and both are substantially better, than the 560, for modest extra cost.
Have you fully considered Ivybridge? I know you can't overclock Ivybridge as agressively, but it starts with a "headstart", so you don't need to, in order to obtain good performance, apart from being 2 generations more up to date, unless you have a particular interest in the process of overclocking, itself.
I just noticed, re-reading your original post, that you'd already got the 920. Sorry about that. Yes that all won't be a problem. The new GTX660 looks to be a good performance/price point, and, yes, will work fine, with your set-up.