I'm helping a friend choose and I don't know which direction to steer her in. I have a ladies two-tone and a ss mid-size jubilee/fluted - one with roman numerals and other with diamond markers. But I don't know much about the two she is considering. Recently there have been some new rolex threads esp. with yachtmaster. Which model can be worn for 20 years and still look in style? No one has any new threads on the airking lately. TIA!