Ummmm... my suggestion is also to stop crosschaining... if you find that that is the gear combination that you are most comfortable with than perhaps you should change your cassette to accomodate that choice...or perhaps even change to a compact crank.

You didn't mention whether your bike is a double or triple, however the Saint hub would be quite a bit of work for a shop to set up. First, it's a mountain bike hub that is spaced differently than a road bike(mtn bike spacing is 135 and road is 130) . A shop could change this to accomodate your bike, but it's also a long cage derailleur...is that what you have on your bike now? If not, then the shifting will be quite a bit slower with more chain slap when you shift. The long cage derailleurs are setup for cassettes that are 27 tooth and up.. is yours in that range?

You mentioned that your derailleur hanger keeps bending ... have you replaced it each time that has happened? You can generally bend these back, but obviously they are not as strong as they once were...

Good luck with this!!