After hemming and hawing, I'm ready to buy an Apple Watch. Of all the different models, colors and bands, which combo is the most versatile in which you can wear it while working out, at work in business settings and casually? Or is there no such band and it's best to have multiple bands? In that case, would space grey or silver be better? There is no Apple Store in Korea to visit for trying out, and resellers don't always have watches for customers to try out so I have to go by images and recommendations.