You won't have a problem going with the 13t front.
Only if you do not clean,adjust, and lubricate properly will a smaller front "make" your set-up wear faster. Yes, a smaller front does require more work to get the job done, but if you are cleaned, lubed, and adjusted correctly it will not make a difference on longevity.
If you do see a considerable difference when using a 13t front, then you have a problem in one of the three afore mentioned areas.
Clearance should be your biggest concern. And I also agree that the set-up can minimally effect your suspension action.