I started out with a Reduced - in fact it was a absolutely trashed example. I ended up cleaning, repairing, and servicing the whole watch and bracelet. It still shows it's age and history but I'm pleased with the result.
I'm not mentioning that to toot my own horn but to say I've worked on the DD Module. Sure, it's a little tricky and not as intuitive as a chronograph movement but it's not THAT hard. I've only ever worked on one. I'm a hobbyist. Any professional watchmaker worth their salt should be able to handle it without issues. That said, I don't know if Omega charges a different premium for service compared to a Speedy Pro.
Also, full disclosure, I bought a Pro shortly afterwards. While I like the size of the Reduced (it does wear smaller than a Pro) I'm a sucker for the heritage of a Pro and a screw down case back is important to me.
I think the Reduced is a very nice watch. Mine is keeping spectacular time and handles my abuse handily (cycling, martial arts, kids, etc).
Try on that various options and go with the model that suits you best. I think you'll be perfectly fine with any of the movements. It's not like the DD Module is a cheap Asian clone or something.
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