Family Trip for Post-Easter Week

Hello travel board!

We have spent some time planning travel to San Diego, CA, for the week post-Easter, but we are having a bit of trouble biting the bullet and paying $700-800 per person for plane tickets. We are a family of 5 - me, my wife, and 3 kids (2 teens and a 2nd grader).

We were interested in San Diego because of the variety it had to offer - beach, baseball, Midway, zoo, Sea World, etc. Plus we figured it would actually be nice weather at springtime (vs the midwest and the northeast).

Does the board have any suggestions about places worth exploring that may not be as hard to get to? I'd rather spend my money at the destination than using all of it just to get there.

Miami / Key West?
Pacific northwest?

We've spent tons of time on the beach or in big Texas cities...what should we turn our attention to?