Ok folks, after deliberating between a Zenith El Primero and Speedmaster, the logical choice for me is the Omega. Simply because Zenith ADs are not in my country, but Omega is well represented. I don't want the hassle of sending an expensive watch overseas for service/issues, and the Zenith has stories all over the web of requiring service more often than the Omega chronograph. Which brings me to a new dilemma, if it were you, and you didn't really care about the NASA/space legacy as much, which would you chose between the sapphire sandwich and hesalite moonwatch. I hate, completely despise, would die, if I saw scratches on my crystal. Seems like I've answered my own question, but still interested in your views.