... only been there once but I think sanur is a good base to start from and depending on wind, you can head off to other spots, upwinder or downwinders.
As Jankie said, you can kite to Nusa Dua from Sanur and back again with ease. Infact I was on my way there when I found a brilliant spot on the way didn't bother going any further as I was having too much fun. Stayed there for 2 hours kiting side on wind point break with 3 to 4 foot waves, perfect easy relaxing time.
Mind you when, I got myself in such a zone, when I tried to come back and noticed the 20 or so other kites that were out, were gone!! WTF I thought. As it turned out, the tide dropped and the water dissappeared over the reef. I had to land well downwind and walk back, no big deal and it was the Best 2 hours kiting I had. Side on wind with 3 to 4 foot waves, perfect!
cheers,
Robbie