Exploring corridor south of Cancun to Tulum

[sytech]

I am a diver and have spent a lot of time in Cozumel and have gone to
the Cenotes ("Dos Ojos") south of Playa del Carmen.

I am interested in traveling along the corridor between south of Cancun all the way to say, Tulum.

Would like to get recommendations for reasonably priced hotels along
the way which have the usual amenities (a/c, tv etc) but aren't the
garrish all-inclusive types. Would also like to hear about some good
dive locations.

Proximity to the water and dive shops would be important though several
blocks away is fine too.

Any recommendations or comments will be appreciated.

Thanks,

Sy