I will definitely try both the 43 and 47s on Saturday. Thus far I have yet to sit on a Trek at all...and I know it varies by model/make.

So, I guess I should start a new thread if I want recommendations on wide (but small) biking shoes?

I have pretty severe bunions that cause my shoes to need to be wide in the toe box (although everywhere else I'm narrow). I'm thinking I'll be a 37 or 38 in a biking shoe.