Ugh. As much as I yearn for smooth water, I don't know that I would do salt. I don't know that any lake could get chopped up faster than Castaic (save maybe Piru!). I heard Pyramid is closed for a while.
Silverwood I would characterize as being like Castaic, though I've really only been there on weekends a couple times-- but each time has been chopped up pretty bad.
Elsinore? I'm guessing better than these others but I haven't been there yet. I hear there's a smell there you sorta have to ignore. Oh well.
Personally my preference to finding and riding great water is getting on the water at sunrise and/or near sunset. Wherever is closest. For me, that's Castaic.
Good luck.