I like the idea of the bracelet upgrade (although, still like the looks of the older bracelet more). I'm not into the NATO strap thing so that would be irrelevant to me. Its not a make or break upgrade (and in the event you are just starting your research the movement is a bit different than what was in the original Moonwatch, which was cal 321).
For some it will merely be a question of whether the price increase is worth it to them for the upgraded bracelet, box, strap, etc, or if they would rather look for the previous model.
Thanks Dino... I research any (for me) significant purchases so have a fairly decent knowledge of the history of the speedy pro and associated movements (cal 321 -> cal 861 -> 1861) plus move to coaxial for DSOTM, '57 nod, and others. Also learnt a lot about other watches... of which you have my grail the Royal Oak jumbo.
The 3570.50 was the watch for me (and may still be), as I like the looks of the hesalite and it's the closest modern version to the moonwatch of years ago. The replacement release does throw in a small conundrum as I wouldn't be adverse to buying lightly used meaning the 3750.50 could still be the one. I guess when the time comes I can shop around and look at the new model and make a call on f the bracelet and extras are worth the extra cost to me (and if I prefer the aesthetics of the new bracelet).