For me, the Ocean will be strictly for diving. It think its not very comfortable, and btw, I don't think the Alpine is either, and that has other issues.
Any 45mm band will be fine, and I don't see any need whatsoever to stick with a made -for-Ultra band. they aren't very comfortable. They are athletic bands. When is the last time any one has even broken a sweat other than being fat and sweaty?
Maybe the Trail loop is good? Probably not. Good luck finding that, anyway.
But the Ocean band is the best (and only?) truly waterproof option, and it's fairy comfortable.