Great choices! I really like the blue Black Bay 58 as well. The GMT might end up being the third watch in the Tudor collection but probably only if they can find a way to make it a bit thinner.
I contemplated the same choice and concluded that despite Tudor having the better movement, the Monta is just a much nicer watch to wear. The size is perfect, the bracelet is comfortable and adjust able on the fly, and the finishing on the Monta is superior in my opinion to the Tudor. Although Tudor has more brand recognition, the Monta is the better piece to wear.
Thanks for the question! The Airman Chief is offered with both options, one that is a GMT and the other that is a 24 hour watch. The way that you know the difference is that if the watch has a fourth hand, that means that it functions like a typical GMT. If it only has 3 hands, the hour hand goes around the dial once per day like a 24 hour watch and reads the second time zone off of the bezel. In my collection above, the last two watches shown are my GMTs while the rest are 24 hour (referred to as purists).
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