CPU: Was trying to decide between this and a i5-4670k. Got a really great deal on the 8350 for about $145. Overclocked to 4.4 without a problem but have a hard time pushing any further. Really not sure if it's a cpu, ram, or mobo issue there.
Cooler: I had a hyper 212 evo with cougar push pull fans. Picked up the D14 and honestly, the 212 did a pretty good job of keeping up with the D14. With the D14 I'm getting idle temps of around 18 with intel burn test showing 56ish full load at 4.4 ghz (I think I should be getting better performance than this though.)
Mobo: Fairly happy with this motherboard, however, the settings seemed a bit aggressive once i started OCing. Needed to drop the voltage down to around 1.3 (it wanted around 1.4ish on auto) in order for it to be stable at 4.4. I also needed to adjust the load line calibration to be a little less aggressive.
Memory: I had 2x4gb of the G.Skill ripjaws 1600 left over from my last rig. So i supplemented it with another for a total of 16gb. I should probably just get 2x8gb of 1866 though. Not sure if that will make any difference in my 8350 OC potential.
Storage: SSD + 2x2tb media/game drives in raid 0. Not much to say there.
GPUs: Came from crossfire 5850s to these 2 crossfire 280x's. Got them both for a good deal. Scorches through benchmarks and most games. However, some games I see a definite CPU bottleneck. Crysis 3 I get better performance with 1 card than I do with 2 ( the welcome to the jungle level (with the tower) shows this the most) and Battlefield 4 I get some decent fps drops in multiplayer. I'm pretty sure these minimum frame rate issues are both CPU issues and I might upgrade to an i7-4790k to alleviate the bottleneck.
Case: The R4 has a been a pleasure to work with. A really good case. Lots of room and cooling options. I have the windowed version, so it looks nice too.
PSU: Got this for a good deal. Version 3 of this (CMX 1000 V3) got some decent reviews, comes with 2 60a12v rails and is semi modular. The modular cables a kind of a pain though. They're flat and hard to bend and work with.
OS: Win 7 (hey, free upgrade to 10)
Fans: The orange Cougars are pretty nice, but at some point i realized I needed fans with better static pressure. Grabbed a few Rosewill Hyperborea 140mm fans and LOVE them. My favorite case fans. Fairly quiet and move a lot of air. Really good static pressure too.
Overall: It's a really great build, however, I'm now eyeing an i7-4790k swap in or order to get more performance and hopefully alleviate the minimum frame rate issues/bottleneck.