Already have Accessories (Monitor/Keyboard/etc), Storage (SSD/HDD) and RAM. Missing anything? Anything a dumb choice or incompatible? Which brand of 560ti was kind of not well thought out, in particular.
You could put a couple of 560ti's in a decent $99 mid tower case. I recommend Corsair Carbide Series 400R, Lancool PC-K62, or the CM 690 II advanced. ( choosing the case it's a matter of personal preference) but you could save up some money and buy a better card or for the future sli configuration. The corsair tx 750W v2 could be a great option too (that antec psu it's larger than standard psu's and you could have trouble mounting it in your case)