Looks nice. I can't say too much about the Intel CPU since I strictly build AMD, but the K series Intel stuff has always been overpriced in my opinion. I'd get a non-K Intel 4770, or go for an AMD FX-8350 instead, which is
nearly comparable to a 4770 (non-K), has twice the cores (arguably better for multitasking, but some dispute this), and is half the price. If OC'd right, the 8350 might be able to outperform a non-K 4770.
I can only recommend AMD FX-8350 under a very specific requirement. For generic use it is much better to stick with Core i5/i7. AMD FX-8350 extra "core" counts are only useful in certain workloads. I briefly did x264 video encoding with an overclocked FX-8350, and the result was slower than stock i5 and i7. Unlike online benchmarks which always shows 2-pass encoding, I'm doing quality based CRF encoding, which is always single pass. People who does online benchmark online couldn't even tell the meaning of 2-pass video encoding (average bitrate encoding, sacrifice video quality for predictable file size).
If you are building a Linux/BSD system, doing some serious cryptography workloads (except AES), need ECC RAM on a budget, etc, FX makes sense.
CPU are priced according to performance. AMD has in the past released "overpriced" CPU, such as FX-57 and FX-60.
Also, ASUS MoBos aren't the best around anymore. I had two DOAs in a row last time I used them, and my prior system had an ASUS that gave nothing but headaches. I'd look at MSI. If you need something hard to get nowadays (IDE, a floppy controller, etc.), then AsRock is where to look. They make a few boards with old (and occasionally strange) features on them.
Unless you need floppy controller (last time I saw it was on Z68 Extreme3 Gen3), the rest all be found in the forms of PCI or PCIe expansion cards.
The RAM...for $5 less, you could get 1866.
For the power supply, I see you mentioned switching it for a SeaSonic...good choice.