calibre 3186 question.

[flames]

Hi. After some googling and exhaustive searching for what will be my watch (still looking), I think I have it figured out... but I have a question.

First off, I'm a pilot for an airline, so a GMT hand is an actual useful tool for me. I started this search dead set on getting a GMT II. It's the pilot watch and seemed the perfect fit. However, I don't really love the green of the latest model. So I would occasionally come here and search for the perfect GMT II, which incidentally was a black bezel, pre-ceramic.

Somewhere along the way, I have fallen deeply in love with the Explorer II and it's made me forget about wanting a GMT. I don't have a big wrist so I am definitely looking for the 40mm version. I have also seemed to have mentally selected a later model (late Z, M, V serials) because of the 3186 movement. This has very little to do with speculation about rarity or anything like that and more to do with thinking that perhaps the movement would be a little more accurate in my environment (cockpit, magnetic variance, probably over-thinking this part). Also, I am thinking these later models will be less in need of servicing. Obviously it's not inexpensive to have a Rolex in for authorized servicing. Is my thinking that if I buy an earlier model that it might be closer to needing service correct?

It seems that I keep seeing 3185 watches and mentally crossing them off of the list because I have decided that the 3186 would be better for me. Am I ruling out some great watches for no good reason or is my want of a 3186 based on some sort of sound thinking? Thanks!