My fairly newbie paddler here went with the Medium AntiX with an IR rand skirt. Not sure he will need it, but !   Bought it from CRS and it is here at his house  in Santo Domingo in less than 2 weeks.  Fairly amazing. He had it shipped to Miami and then work connections sent it from there. As the worst instructor in the world, I would like to put him in touch with you so you can recommend a sort of curriculum I can put him through. He has had a course, like 5 days at NOC, and I have already run him through some 3+ and easier IV stuff. Very athletic. We will be in touch !