OP
Melanie White
Contributor
To me, a lot of these certifications are nothing more than a revenue generator for the dive shops and the agencies. When you do your AOW, you should be certified to 120' depth. This only means that a USA dive op isn't liable if you have an accident that is by your doing.
I would get the AOW and Nitrox, and then think about Rescue Diver. RD is physically challenging, so I would do it sooner than later (I wish I had done mine before I turned 50). If you want to proceed from there (DM, Instructor), that's up to you. Rescue is about as far as I am going to go.
I'm getting my Nitrox certification in CZM this November. P3 is good enough to throw in two free nitrox tanks as part of the certification. I suspect you're getting the same deal.
We are going to Scuba club Cozumel
they include 2 dives as part of Nitrox