chill out on Sanur's beaches; you will be pestered, like on most of Bali's beaches. Chill out beaches are Pemuteran and Amed; the later has a fairly young (and other) following, not as brash as Kuta. I would do 3 / 4 nights Ubud, maybe take in Besakih and the lovely water palace at Tirtagangga on the way, then the rest Amed. Ubud is only 1 hour from the airport, so not bad for when you arrive and well worth it.