no reason whatsoever for a $400 motherboard when you're running one video card and not pushing ridiculous over clocking.
i got this one the other day for $120 ish, should do the trick on most builds pretty well, and has "killer nic" and some sort of integrated sound blaster solution.
http://us.msi.com/product/mb/Z87-G45-GAMING.html#overview
i'd get a bigger hard drive too, 240 gb ssd are cheap now,
i have a 120 on my mac mini for os drive, even with extra drives for media and no games it gets a bit tight.
i don't know whats good with modern gaming cards, but a 800ish watt power supply, 16gb ram and i5 seem like they would carry you, no idea what that case is either but a good case will outlive any other hardware at least till atx is dead. I shelled out for an awesome lian li case about 10 years ago, still using it today, has seen every one of my pc builds since.