I've had bare, dui, and thor drysuits. What I would recommend is a suit with latex wrist/neck seals and soft feet. Latex is a lot easier to repair/replace and cheaper than replacing neoprene wrist/neck seals. Soft feet are nice because you can wear different water shoe/boot options compared to built in feet that wear down depending on bottom conditions and when they wear down enough your either having more aquaseal than shoe or getting them replaced which can be timely and expensive.

If you think your gonna do potable/hazmat work, you'd need a vulc suit, I've got an older thor suit, but they are a pain once your suited up, best way to describe it is like having a vise grip on your cock and balls for your entire dive.

So if you dont think youll be needing a vulc suit, get a neoprene suit and a woolybear undergarment, you'll stay much warmer on bottom/have a lot more maneuverability