NH-U12A is the first air cooler that is exciting in a long while.
It has 7
heatpipes (staggered in the airflow path) and the NF-A12x25 fan , plus it's asymmetrical.
I'm interested in the low RPM performance though : it has 2 NF-A12x25 so it should still perform decently. The fin stack looks to be increased in FPI , there's at least 50 fins.
This will likely dethrone the likes of the Prolimatech Megahalems and Scythe Mugen 5 as strongest 120mm fan coolers. It's 760g without fans and 7 heatpipes and 58mm depth; Megahalems is 790g with 6 heatpipes and 74mm fin stack depth; Mugen 5 has much thicker 85mm fin stack with 6 heatpipes but is around the same weight as well (890g with fan - 140g from 120mm Kaze Flex spec
= 750g). There's some other coolers in the 120mm size but they're mostly budget oriented such as the 167mm tall Coolermaster MA610P , 165mm tall Silverstone Argon AR03 (likely press fit fins), or 165mm tall FSP Windale 6 , which opt for direct touch heatpipes and aren't as high performing.
Megahalems for comparison: http://www.silentpcreview.com/article916-page4.html
~47 fins , Fin thickness 0.5mm , 2.0mm fin spacing , 45mm clearance underneath
Mugen 5 is 39 fins, 2.0mm fin spacing and 0.4mm fin thickness
(Also for reference , the 770g NH-U14S has 0.42mm fin thickness and 1.72mm fin spacing : http://www.silentpcreview.com/article1359-page4.html
, though if you don't count the low fin area fins there's 51 fins instead of 57)