Count me in the "why would you need _more_ than one pair" camp (guess there aren't that many of us).

After having a lot of problems with my feet in the last couple of years (even when I had custom orthotics made) I finally got a pair of MBT's in July and I haven't taken them off since. Well, I did when I bought a different pair a couple of weeks ago (the first were great cloth, and the new ones are black leather, better for winter work dressing).

I spent a week walking for hours each day around Italy last month in them, and am in NYC walking for hours each day now in them, I need no other shoes.

Best selection is online, but I got both of mine in higher end shoe stores.

http://www.swissmasaius.com/