Why not option C)
HX10
50 + Hyper 212+ ? It will net you probably as good results as the Ninja and cost 10 bucks or so less. Hell drop a SECOND fan on it and it will certainly do as good or better. Stacking heatpipes on top of heatpipes is foolish and mainly a e-peen extender.
OR D)
Stretch your budget by ten bucks get the HX10
50 and a Prolimatech which is on sale for ten bucks more than the ninja. ;)
NCIX.com - Buy Prolimatech Megahalems Rev B CPU Heatsink Cooler LGA1156 LGA1155 LGA1366 LGA775 - Prolimatech - Megahalems Rev. B - in Canada
or E)
Relaize that two 480s plus a 950 will NOT need 950 watts of power.... and go with something like the Corsair AX750 / AX850 (or seasonic X series) + Prolimatech