Here are a few def rentals to have on your list:
Tres Amigos Beach house: right at Dogmans & Marias, literally on the beach at Dogmans. For a group of people, SICK place to stay.
www.tresamigosbeachhouse.com
Pools Beach: Another great place to stay, eat, and surf. Right at Domes and close to Sandy Beach. They have a pool with a huge movie screen that plays surf videos and they also have awesome sushi. Place can rock at night too!
www.poolsbeach.com
Fish Eye View: This is an amazing spot and the owners are actually from NJ. The guy runs the parasailing in both Belmar, NJ and Rincon. The place is on top of the hill overlooking Marias and is highly reccomended by me and my crew.
Lazy Parrot: Another place to stay that also has great food and a nightlife. A five minute drive to the ocean, but it's def a nice place to stay.