Hi, i will try, i am not familiar with your present cooler, but once i upgraded from a Tuniq Tower to a NH-D14, which, the Silver Arrow is slightly better, my temps dropped over 20.C.
So i would defo recommend it.
Just make sure it will clear your ram.
Have a look at this thread, when i first posted my results,
http://forums.overclockers.co.uk/showthread.php?p=19032095#post19032095