I ride on a 261mm waist with size 11 Burton Rulers. I definitely would not want a board any wider than what I currently have, and for my next board I am aiming for a waist width somewhere in the mid-250s range. I would say from experience that the 256mm is the better choice. Not saying the other will be a problem at all, just the 256mm is what I would take... it'll give you that bit of overhang that is not too much so you get a little better leverage. Oh, btw i ride +12/-9 at the moment in case it matters to you.
Last edited by BiG NicK; 03-15-2013 at 06:26 PM.