There's no such thing as a 'one jib does all'
Good post above, I think more people need to understand this.
Most boats these days are equipped with the one main, and
one roller furling headsail that came with the boat.
If the conditions fall outside the wind range the headsail will
perform in, many people end up motoring as often as not.
A 150% should be a good addition to a Newport 30s
inventory for San Diego sailing.
A spinnaker would be nice to have if you end up doing
coastal trips up to Catalina or down to Ensenada.
But sailing in and around San Diego ends up being
predominately beating or reaching.