To tell you the truth, custom loops scare me. lol
To do a custom loop, you have to get the right parts and you don't want to go cheap there. You have to size it and connect it outside of the case to test for leaks at least 2-3 times. Then disassemble it and install the parts into your rig. Put the parts back into your rig and connect the tubing. Test, test, test again for leaks. Bleed the air out. And then, you have the maintenance....
I am scared and lazy, so I went the easy way with the H100
To be honest, I also found a deal that I couldn't refuse. I was planning on the H100 anyway but when Black Friday hit, it was game over. Too good a deal to pass up. I wish that I had bought 2 units back then.