Legend's build looks good, although personally I'd go with a little storage (videos eat disk space). If you wanted a plainer case, the Fractal Design Define R4 is very understated and also does a good job of being quiet.
Assuming you're looking at graphically complex games, a GTX 760 will be able to play most games on "ultra" at 1080p, so you'd probably want the equivalent of a GTX 760/770/780, dependent upon how much you want to spend (basically, the more games you play, the closer to a GTX 780 Ti you want to be). Although, I would note that the 900-series is due to be announced in about a week (980 and 970 only, with the 960 by Christmas, according to rumours), so I would advise looking at what comes out in that if you were looking at one of the 770/780 models.