There's a Ti version and a Ti founders edition for 1080's.
Personally I like the 1080ti FE, the blower... blows. If you're going to put the coin down and have the room for it, I'd recommend standalone watercooled mods to the 1080ti FE. I run an Nvidia 1080ti FE on the EVGA watercooler built for it and rarely even tip toe into 58C+ conditions. The standard blower however will run at a real peachy 70C+ temp, but being as close as they are to each other in my MOBO I opted to put the upgraded cooler 1080ti in the top slot since airflow would be limited.
You can run a loop, nobody can stop you. You can blow a decent portion of your budget keeping those temps as low as possible however you'll risk a lot if they are all connected to each other. For the money, I'd opt for hybrid cooling solutions for each individual card. Better to have one go than the whole shebang - if you do opt to replace coolers. The Arctic III seems pretty reliable as well for aftermarket and fairly priced as well w/o having radiators going anywhere.
All the PCIe adapters!
I get about 62GH/s for MD5 ~ but don't do much other than game and run my own pen-test scenarios. I was using two mobos/cpus and each had a 1080ti. One with Parrot OS and the other Windows 10 for games. But I realized it's a bit of a waste since I already use Parrot OS on my laptop, I can just send the work I need to my Windows rig and either run the Kali APP in the windows store, VM an OS or, what I mostly do, just run HashcatGUI since it supports Windows. I wish I still had my mining rig... It'd be peachy.