I live in North County, so I haven't tried many. I love the acai from Swami's Cafe in Encinitas. Lots of fresh berries, bananas, bee pollen, crunchy granola, and coconut on top. The acai is tart.
I also love the bowl at Mozy's Cafe in Leucadia. The acai is darker and seems bit heartier to me, not as tart. Tons of bananas and blueberries.