I ran a 16T for a while, then added a 42T rear. Recently I removed the 16 in favor of the original 17 for the front. I did this right before the season ended, so I really didn't get to ride it that much, but I did like that the 17/42 seemed to work very well on the street and didn't effect the speedometer so drastically.
I might go back to the 16 front eventually, but I want to run it a bit more this spring.
My .02 cents.
Corso