i don't know anything about watercooling
and I don't do extreme overclocking so I wouldn't really gain a lot
If you can install a heatsink you can watercool, I use All in one watercoolers like the Corsair H100i, I could only dream about making my own watercooling loops, but its expensive.
My computer is the most silent thing ever, the only thing I hear is the 1TB HDD where steam is.
I use a SSD for Windows.