I'll be getting the base model probably with either the stainless steel strap or that one with the ridges. Can't imagine how it's gonna work when you physically buy one in an Apple Store with all the variations which are available. I can imagine lots of variations just not being in stock in most places if they aren't so popular. I can't imagine the price of that 18 karat gold one or if many stores will stock them. Could be an online exclusive. Will be interesting to see how Apple organise all of this!