Quote from Knightmehre;963949:
^ difference between i5- and i7 is hyperthreading. You could argue you don't need it, but if you're going to shell out for a grand pc anyways might as well (and it makes multithreaded stuff easier to process).
Ram, anywhere after 8gb is unnecessary if you don't do any video editing.
Case is also debatable, nobody needs a full tower but it is nice (already they're all heavy as ffffffff)
Sabertooth is a really nice board, but if you don't need all the extra features I'd go for an ASrock extreme board. They lack WLAN in the cheaper ones, but I use a gigabit powerline switch anyways :)
+1 on the 560, I was thinking of getting one myself (I have a 460 now but I might end up with the 670)
AND DON'T FORGET TO BUY WINDOWS 7
Hyper Threading can cause performance issues with quite a few games (why I disabled it :P) (and yes, I did notice a performance increase after disabling).
So if you do a lot of gaming, probably better off getting an i5 and putting the rest towards, say, a better graphics card or something.