Well the noctua is a really excellent cooler, better than most water coolers. It's also cheaper, but you could go for the H100i if you wanted to.
That's great then, I'd feel more comfortable using the H100i to be honest. I suppose like its predecessor it has capacity to be configured in push pull (not that it yields a vast advantage).
Thanks to everyone who has taken the time to put together build suggestions. They have provided an excellent insight and I am most appreciative.
I'll post my next build spec revision very shortly.
I still do have one sticking point, I know you all recommend these Gigabyte boards and I have been researching the gaming 5 board specifically. Please excuse me for still having some reservations, I have almost always used Asus kit before.
So far I have found that there are some considerations when using XFire/SLI with the SATA express/M.2 ports; that they reduce the number of usable PCI lanes as they route the bandwidth. Additionally something slightly odd - it does not conform to the ATX standard (it's shorter on width than standard ATX). Only an issue when one has a case with a giant CPU cut out. One thing that I cannot find however is much contrasting between these Gigabyte boards and the Asus range, specifically BIOS and software. Yes I could go as far as pulling the technical spec from each respective website and doing it myself but... I thought I'd ask first - wondering about real world experience.