Even if Apple doesn't restrict bands that people buy, not all of the bands will go well with all three case options. The Sport model is made out of aluminum. The Milanese Mesh band may look out of place because of a mismatch at the place where the band meets the case. I wouldn't be surprised if the Edition version sells for tens of thousands of dollars. It's clearly aimed at luxury watch customers. If Apple prices it like that, Apple probably isn't expecting to sell very many of them. That version of the Watch may not even be sold in all Apple Stores. It may only be sold in some ultra high-end locations like the NYC Apple Store.