Will Corsair H60 FIT? In my case

The H60 will fit and will do just fine.

It’s at the low end of closed loop systems but it’s very reliable... just don't leave it in a cold room, we had a person post that one had frozen and blown up.

Many people have a resistance to closed loop systems, I did. I used Coolermaster air coolers exclusively for years. But now I have an Antec H2O 620 on my system. Do I need it? No. Do I plan to need it? Yup. If you want one, don’t let anyone talk you out of it.

Installation is difficult for some people. There are several videos on line. Watch a few before you dig in and take your time. I think there is one or maybe two companies that make these things. They all look very similar and have similar mounting systems.