I've come close to ripping my frt. derailleur off and repl. it with a chain guide several times. The only thing that's kept my 22/32/BG with 11/34t setup is the few long rides that ended in a near vomit experience...the 22x34 ratio kept my legs moving and kept me on the bike for that last climb.

I'd go 34, but...I'm on a 32lb inefficient piggy.