Ghata

Maybe Gang Beasts.

It depends on the tasks you are going to do. Cycles can render with your cpu or gpu. Gpu based render engines are faster, but limited to the Vram. They are faster, because a Gpu can handle more Threads than a Cpu while rendering. Gpu render engines only can use the Gpu Storage (24gb with a Quadro M6000) Most common used Gpu based render engines are Octance, Redshift, Moskito and Cycles. I think V-ray got a gpu support as well. Most of the Gpu render got an IPR mode which is absolutely great for previewing. Redshift is a little bit different. It can use the main storage and is not limited to Vram. For example a typical Redshift Workstation got 4x GTX970's. Like wizardy mentioned, what are you going to do? I'm using V-Ray, Mantra(Houdini), Corona and Renderman from Pixar. In my case is a Cpu based system way more important, because I'm making large scaled explosions and other visuals. Sorry for any written mistakes, my english is not the very best.

Like you mentioned, Corsair got the 600c but it feels kind of cheap. I use'd it for 3 months an it was awful. The Dark Base 900 is a great idea like SonoDanshi and Zyndo said. You can invert it if you want to, but if you need it "normal" you can do this too. If the position of the mainboard isn't that important, you can use a Thermaltake Core X5 or x9. In these cases you can choose which Panel should go right and left.

Like itzzkolt replied you don't need to buy an additional Thermal Compound. The Noctua Paste is pretty good, but if you want to get a better one, i would recommend you the Thermal Grizzly Kryonaut. This Thermal Compound is even better then the Arctic MX4, in my opinion. Like Apollo wrote, you're going to build a sexy system. Why don't you show what you got. Everything in your list is kind of white and grey, why don't you take a case like a grey Phanteks Evolv Atx with tempered Glass. A big feature of a grey case is, it takes a way longer to see dust on top. Sorry for any written mistakes, my english is not the very best.