With these changes it will be a much better build and it costs less http://pcpartpicker.com/uk/p/t6ml
Way better cpu for gaming and better ssd. You don't need a 900w psu and that one didn't look to good. The xfx pro750 is a good psu and more than enough even if you add a second gtx 660 ti later. You also don't need a full tower for this build and the corsair 600t is an excellent case. You can add 8gb more ram if you plan to record your game play if not the 8gb will be enough.
Yes, realize the 600t is monster anyways even though it says it is a mid-tower, I don't wanna know what a 800D full-tower looks like (I have the 600, I loved getting to do my first build in it, but the thing is massive).
Hopefully better airflow then the 600T because the airflow in a 600T is god awful. I also agree with strife I would lower the watts from 900 to something a little lower I and more efficient maybe something like a CORSAIR HX750 if you can find that one.
Its a decent case by the look I'm not to into the flashy side of things anymore I can appreciate something simple like the phantom which is a bit on the flashy side but still isn't overly vegas strip looking. I've been looking at the phantom full tower and the Fractal Design Define R4 (because it has good cooling and noise dampening). http://www.amazon.co.uk/FRACTAL-DESIGN-Define-Black-Pea...