I've had good luck with Corsair, I've had 6 different cases from them now. I like the C70 due to the spring loaded rubber handles on the top, makes it easy to move it around if you go to lan events or such things, probably my favorite mid sized.
I too have a 750D and it's elegant and simple - I've had both the "other" 2 full size Corsairs, the 780t and 760t. 780 looks better, but the 760 has a nice hinged door to get at your PC internals.
Someone mentioned the Cosmos 2- our 5960x box is in that..box. We got it on a black friday sale for 220$ CDN, which is a huge steal, and I'll never sell that case. It just isn't all that practical for moving around a lot I find, but once it's in position it sure looks cool.
Fractal makes very elegant and simple (not in function just looks) cases too.
Bequiet is my next "test", I'm going to try out their 800 with my Kaby Lake or Broadwell E, whichever comes out first (grrrr).
I have found over the years that I much prefer full size to mid size - micro size is fun to make cute little project systems, but when you are constantly upgrading and playing around with your internal components, a full size, or at the very least a well designed mid sized makes life much better, just IMO. I also run SLI most of the time, although I've done this in the C70 with ease, and it's a mid size.