This is a good response. Some people are hasty with their assumptions. It's been 16 months since your comment and I'm curious if you've upgraded. If not, you could consider selling your 4770 and buy a 4790K. The price difference shouldn't be too much if you find the right buyer.
I love what you did with that cable management
No, I got that. In fact, what I really think Jipster was saying in a more polite way, "your desk is ****."
Perhaps you misunderstood what I was saying. Why put X amount of money into a new desk, if you can put it towards a new part? Unless the desk is prohibiting him from being a more competitive gamer, which is his call, the only purpose in getting something newer is for aesthetics.
It may have gone through his thought process. He may have thought, "I can get me a desk, or I can get me another monitor."
Your dream build is to have a 5930K with only dual channel memory? Sigh...
Why OS X 32b? Is 64b not available?
There seems to be a lot of criticism here, but I think you've done a good job. It's difficult to build an X99 system for around $1K. Especially, since CPUs and RAM are still expensive.
Other people are suggesting that you could have stayed with the technology of today (z97-i5/i7) and have a much more enjoyable experience. The 5820 is certainly a beast; however, games right now are CPU dependent and mostly single-threaded, so a CPU with fewer cores that clocks well, will give you a bigger bang for your buck.
But it's tough to say how much you will upgrade in the future. I tend not to upgrade the parts and do system overhauls (CPU/RAM/Mobo) all at once every 3-7 years - upgrading the GPU is a judgement. The thing I continually seem to upgrade are my SSDs. It seems like your SSDs and GPU combined only cost $300, which is almost nothing if you plan to upgrade relatively soon. Probably first get a decent GPU, then get your SSDs.
All that said, not a bad build, especially on that budget and should be able to scale nicely into the future.
Why spend more on the workstation? Put more into the rig!
I could see pros/cons to both.
Since heat rises, making the bottom fan an intake would help push the air up, which the top back fan should expel. If the bottom fan were an exhaust that hot air would be pushed under the box, which would cause more heat for the PSU (raising that temperature higher) also some of that air would be taken in as the intake from the front fan; basically, as an exhaust your system might be doing more work.
The only benefit as an exhaust I see is that you're helping the heat generated by your SSDs and PSU from spreading across your motherboard, it's a quick out there. Also, dust will settle under your box and as an intake, you'd be introducing more particles in your system.
All-in-all, if you put an exhaust at the bottom, it should probably be on the side panel, not pointed directly down.
I'm looking at a similar build myself: https://pcpartpicker.com/user/supervolting/saved/#view=7cQnTW