Being a member of the 200+lb club myself I've also decided to try out a set of 25s for my next set of tires. It's not that the 23s have really given me any problems, I just want to be able to run a little lower pressure to smooth out the long rides. Fortunately my riding buddy (who is only 143lbs) accidentally ordered some 25c Zaffiro pros so I'm just going to buy them off him and give it a try.