The JJ is a very well made unit that will suit your needs. If there is local support for it, could definitely be a solid choice.interested in wrecks deeper than 60m . i know of wrecks in my area at 70m-110m
im an underwater tourist
The pelagian is a very regional unit, I don't know anything about it.
The sidewinder is a unique unit well suited for specific dive environments. It is not well suited for everything. I would never recommend it as a first unit.
I am partial to my O2ptima, but if there is no local support/instruction, there is no point to looking at it.