You'll love Xtabi! It is so nice and laid back. The water is amazing. Snorkeling in the early morning is when the water is calmer and the light, on sunny days is incredible. The staff is very attentive, and the dirty bananas are to die for at the bar.

I don't know about #3, it was vacant when I stayed in #8. It's set back a little off the cliff, not much though. November ought to be cooler than the summer. The fans in the rooms are big and push mucho air down on you. Should be good, I'd think.