I'm looking to have a new wheel build with two sizes of cogs on the hub (not SS). I was initially looking at getting a Miche rear or maybe a Surley hub. When I was talking to the guys at my lbs it sounded like it was not worth it (I forget why but having enough spacing in the dropouts was one (I have run a 17 and a 14 with the same chain and everything fit)) to run two fixed cogs. Do they just not know? Or should I just get a Campy Piste rear with one gear on it. I'd like to have a wheel that I can commute on that's floppable for big speed (I can dream) for ITTs. Any thoughts?