It's SLI-capable for future expansion and has up to 7.1 analog as well as digital sound outputs. Also has all the SATA connections most of us every need on a gaming machine. Great features for the money and made by, in my opinion and based on my experience, best motherboard manufacturer out there.
PSU I would go for is a Seasonic 860 Platinum or an XFX 850W so your ready for SLI or crossfire moving forward:
If you plan to SLI, the 4770k scales better with 2+ GPUs.
If you do NOT plan to SLI, the i5 4670k is a better gaming value for single GPU setups.
* IMPORTANT *
The Cooler Master Hydro 110 needs to be mounted where you have an opening for 2 x 140mm fans. The Cosmos 2 has a suitable top mount for this cooler, but keep this in mind if you decide to look at other cases.