I have a similar situation to yours. I'm going with 340's accross the front with SFT-2 or SVS-10 and 170's as surrounds. It's taken months of reading the various forums to come to the conclusion that a little extra cash is justified with the Ascends. Stop wondering and place your order. I don't mind if you copy my receipe. []
David
P.S. My wife thinks it's all unjustified. [V]