I have recently finished IANTD Advanced Nitrox and would like to develop my diving further trough education. I guess the next step in IANTD would be trimix but I am not interested in that because most of the diving I will be doing is deco dives in the 30-45m range on air/nitrox. I would like to expand my deco experience and also do some kind of wreck course. What do you suggest to do next?