With this SIN score (speech discrimination), need advice in selecting HA

My SIN score is 53% at 85db, with my audiogram scores given below. With this degree of hearing loss, what should I be looking for in a hearing aid? Would some features be overkill for me, ie not useful? My life includes small social gatherings, eating in restaurants, and press conferences. Any specific recommendations would be useful. I live in Mexico where some recent models may not be available. Ideally I would like to be able to eavesdrop along the street to improve my Spanish.