They all look pretty good. I agree with Zeustiak when he says 16GB is ideal. I’d wait on the SSD, though, if money is tight. It’s the easiest thing to include later, as an upgrade. I would say the GPU is more important than the CPU speed here, as the ones you have chosen are all very capable.
I would get a GTX970 at the very least (preferably a 980), but you will find plenty of people who would advise you get a 290X. You are looking at a GTX960, but I think that lacks memory. It only has 2GB of VRAM, rather than the 4GB of the 970 or 290X. You should aim for that much for a 1080P+ screen (which I assume you are getting).
Just bear in mind is not a console, it’s a PC, that you will be able to change and upgrade as much as you like over the years. 
Good luck, and let us know how you get on. 8)