Putting together my first new build. I based this roughly on the 1600 build outlined here: http://www.tomshardware.com/reviews/2014-q1-sbm-gtx-780.... I've tried to do my research but I'm no expert, and I wanted to see if I was doing anything wrong. The most intensive thing I'll use the system for is gaming. Nothing too hardcore: Dota 2, Bioshock Infinite, Starcraft 2. But I'm also willing to pay more to make sure I'll be set for awhile.
That's a great start there's a few things I would suggest:
1. BD-R is no longer necessary since all media content is moving toward cloud computing and online storage. Drop that and invest more in your motherboard and cooler.
2. That secondary HD is ridiculously slow - it will bog down your system. You want at least a 7200 RPM.
3. The MSI cards are pretty decent, I'd go for Gigabyte or EVGA personally.
4. Don't go cheap on the motherboard or the cooler, especially if you plan to do some overclocking.
5. The Corsair Enthusiast series are based on older Seasonic designs. They're still Seasonic PSUs but for Haswell you want the Seasonic G series or better would be a Super Flower model like the NZXT Hale 90.
If you want to OC a lot, the CM hyper 212 won't cool enough, you need more. Also the Pro3 is fine, but if you really want to OC like an enthusiast you need a higher quality board, but otherwise the pro3 is fine.
1866 RAM isn't worth the premium for gaming, only video effects and the such. There is a 1FPS difference between 1333 all the way up to the high 2000s because as you go up in speed, you go down in response time.
Case is quality, don't have to spend that much on a mid tower but whatever you want, it's your case.
Also, for the games you're looking at playing, the 780ti is way overkill and the premium you pay vs the performance you get over a 780 isn't worth it.