Ive only ever been to Marmaris. Emre Beach hotel looks lovely and gets good reviews on Trip Advisor, Its all inclusive though. Do you ever use Trip Advisor? ive got loads of good advice off there!
Kat xx
Olu Deniz is beautiful with a lovely lagoon. I always stay in Hisaronu in the mountains, where it is much cooler. It isn't near the beach, but there are loads of places to people watch and you can get a dolmus down to the beach, or into Fetihye which is the nearest town.
roslyn - I haven't stayed at the Montana Pine, but it looks lovely. I think it's run by the same people who own the St Nicholas hotel in Hisaronu, which is also a lovely place to stay.