I would definitely go to UCSD, but that is just me.
I am also from nor cal, but I went to UCSD as an undergrad, and I REALLY REALLY liked the school and the surrounding area there.
Due to some unforseen circumstances.....i wasn't able to apply there this year...that would have been my #1 choice.
I am happy that I got in USC, but I will always regret that I wasn't able to go to UCSD.
So if you've never been to UCSD, i strongly suggest u to give it a visit.