I, personally, would opt for the Thermaltake Level 10 GT. That's the next case I'm getting, and it has all the features that I would ever need, and then some. It also comes in three versions: Black/Snow/LCS(a complete liquid cooling system consisting of a 240mm rad on the top, and some other stuff I don't feel like explaining because the egg' explains it). It's basically like the NZXT Phantom, but there are more features, and there aren't really any things you need to upgrade fan wise. It can fit a 240 on the top too. It has a fan controller, and you can change the colors of the 3x200mm led fans. Look on youtube for more detailed info.
The Elysium (BEHEMOTH *cough* BEHEMOTH) is a great case if you don't mind the size of it. It's probably the most expansive case that's been mentioned on this thread so far.
The Phantom isn't a bad choice either if you're going to upgrade all of the fans in it. This case was actually my first choice, but I didn't want to spend the extra cash trying to 'max it out'. For what I was going to do with it (replace all of the fans with high CFM ones), the price of it completed was pushing about $250.
So, all in all the Level 10 GT is a great median between the two cases. All of them support water cooling, and the Elysium more-so. The GT is more portable because of its handle, and it has the most features (5 hot-swaps anyone?). The Phantom probably has the best cooling performance out of them when all of the appropriate fans are installed, but like I said before, the price can get up there. Look on youtube or some reviews on the cases to make your final verdict. You can't go wrong with any of them.
I was looking at the Strike X cases from AeroCool, but I don't think it fairs well with RX360 as well.