AI Resorts - Help!

I am trying to book my first AI vacation and am overwhelmed by the
different resorts. As best as I can figure, the major players a

Club Solaris (Sandals, Beaches, Solaris)

Super Club (Breezes, Grand Lido, Hedonism)

Couples

Riu

Club Med

How do the different brands vary within a family of companies?

We are looking for an adult resort (not for the swinging but to get
away from the kids).

Travel will be in early April. Ideal attributes include tennis, good
golf, good food, nice beach and ground level accomodation (as opposed
to a hotel room in a tower).

Any suggestions?

thanks,

Ian in Toronto