I've stayed in hotel Cambri in january...it was nice, hot water, cable tv, small pool,nice italian restaurant... In may I've stayed in a new hotel just after the cambri (on the road to samana), Hotel Mar y Sol, nice rooms all new so it was very clean, problems with hot water in 1rst floor but I think now it's ok, nice beds...I' didn't like the restaurant...but people were very friendly and helpfull. This hotel is on the beach.
In October I will go to the Sinai but I can't give an opinion for now.
All this hotels have rates about 1000 pesos/night ( at least for foreigneirs I don't now the rates for locals)