My girlfriend had a really outdated system. AMD FX-6100, Zotac GTX 660, 5400 rpm hard drive, and a really crappy mid-tower case. She was also unfamiliar with the perks of mechanical keyboards, so that's why the CM Quickfire is there. Oh and don't mind the dust.
I went with the i5-4690k since it is arguably the best processor for purely gaming. An i7 is unnecessary as hyper-threading is not yet utilized in games, and by the time it is, I will likely replace it by then anyway. Currently have it at a stable 4.5 GHz at 1.2v. Ran Prime95 for 4 hours and maxed out at 86 C, though Motherboard temps were higher. Can't seem to get it over 4.5 though, but it just may require a bit more tinkering.
The SSD is being used as the OS drive, as well as for some games that demand fast Read/Write speeds (Looking at you, DayZ). The HDD will primarily function as storage for any massive files, like movies, editing software, etc.
While the h100i is not the best choice for an effective CPU cooler, it gets the job done. And the adjustable color of the Corsair logo on the block is really nice.
The PSU is a bit overkill, but adds room for other possibilities in the future.
And I have to say, the tower is likely my favorite so far. Very easy to route cables. Definitely using this on my build.
The RAM isn't on here as I already had some. It is Kingston 1333 DDR3 16GB (2x8).
Last pic has some horrible cable management, I know.