Sorry for the super later response!
Yeah I remember asking a similar question way back but that was a little more specific - whether the Noctua 15s can be mounted on a supermicro board.
NH-D15, as far as I can tell, can't be fitted. UH-14 is also too big (by the looks of it) so the "top end" solution from Noctua would apparently be the UH-14S.
Don't get me wrong, I know these CPUs are fine with smaller coolers but just for the sake of it ... and because I could fit it into the budget ... I am looking at the best option. Watercooling is out of the question - I am too afraid of leaks :)