Tons of options and it depends on where you are staying and what you want to drop on a round.
If I had the choice between Trump and Pelican, I would play Trump just because of the Ocean Views on every hole. Lot closer to downtown LA and Pasadena as well.
Rustic Canyon aint bad for the money but it's not a lush green track like a Pelican/Trump/Aviara. North of downtown in Moorpark
For the money, and not a bad drive from downtown, I like both courses at Industry Hills. Play can be slower but tracks are always in great shape.....nice bar/restaurant there.....filmed the Tom Brady golf episode from Entourage there.
If you are in staying in OC, there's Pelican.....Oak Creek is nice but unless you can find a good deal on line, you will probably feel like you overpaid. They also have the St.Regis at Monarch Beach. Very nice course and will run you less than Pelican. Only ocean views on a few holes but a great course and location. More affordable options in OC are Arroyo Trabuco and in San Clemente, Talega.
San Diego, Aviara is a nice as you will play anywhere and La Costa is there as well with the new updated 18 hole course (36 holes total). I would play Madera over Crossings as it typically lands in top 100 public US courses.
EDIT: if you are staying north of LA and have a car/time, drive to Santa Barbara and play Sandpiper.