Aside from Hawaii, there's always the San Diego area - its wonderful. Add in a few days in Laguna Beach, Dana Point. can't go wrong hanging there for a while with lots to do.
I agree, SD is great and I usually stay in the Del Mar area. Really fun during Goodguys too. Coronado Island is also great plus a trip to the Point Loma lighthouse, etc etc.
The Fairmont Grand Del Mar is my favorite hotel in the 48 states