As you were considering the relatively modest but classic 212 cooler have you considered the
NH-U14S Ultra-Quiet Slim CPU instead of the monolith that is the D14.
There's only a few degrees difference in performance and it's half the size - and unless you're going for an extreme clock it will still keep your CPU frosty and quiet.
I mention it as I have a similar monolith strapped to my present system -
Thermalright Silverstone. Yes it keeps things cool but it's a PITA to work around and clean (although the Noctua is easier to fit and fans are easier to move). But, I personally feel, the performance does not warrant the hassle or the weight of massive heatsink - unless you're going to be clocking your system to absolute nth degree.
If you're going for a straight forward clock then the
NH-U14S Ultra-Quiet Slim CPU will do the job - superior to the classic 212 but not such a hog when it comes to space and you can use whatever blingy memory that you want (although I personally like the plain stuff).
But, don't get me wrong, the D14 is in a class of its own - along with the BeQuiet - for performance but the fact you were considering the 212 you may want to take a look at the NH-U14S as it's a great compromise between size and performance.