I sail out of Dana Point often, unfortunately, I haven't found any ultra nice restaurant there.  My top choices are:

1] Beach House, with nice view of water

2] A Mexican restaurant, I think it is called Tia Maria [I could be wrong, but you can't miss it.]  It is part of a chain, but this particular one has really much better food than the one with the same name in La Jolla.  

This place used to have waitresses with perfect legs! But those wonderful days are gone!  After a good day of sailing, going to the bar, and flirting with those girls with short skirts, and those legs ... those were the days my friend ... I thougth they'd never end!