Used the NH-D14 in the past I think, bought in 2012 I think and used for over 4 years. Was fantastic. Also used a Noctua single tower with a single fan recently with a TR build and that was fantastic too. So, I'd recommend the NH-D15 if you can fit the height of it into the case.
Water cooling I believe you're looking at a 360 AIO to beat the NH-D15, from what I've read anyway.