I am thinking about buying an Apple Watch (42mm for sure) but I am stuck between two choices. My first choice is the Space Gray Sport. I love the look of the space gray and I think it would look great with other bands. The second choice is the stainless steel with the black sport band. The only thing that is preventing me from deciding is the ION-X Glass vs the Sapphire display. I don't want to get one with glass that breaks easily but I don't know how strong the ion-x glass is. Thoughts?