Well, that's all fine and dandy, but LA's mentality regarding such things is completely bass ackwards. Plus in LA, you need a car to even get around, so a train from SF to LA will have a disconnect in LA, because what do you do in LA without a car? Arrive in SF, and you're in the heart of downtown at the new Transbay Center. You connect to BART, CalTrain, Muni, and dozens of bus lines. Or just walk to your destination.
SF Bay Area's 9 counties population of 11M+ plus Los Angeles and San Diego's millions more, you simply cannot keep building multiple airports. What happens to ground traffic? SF Bay's BART system is pretty taxed as it is. THey can't squeeze anymore trains through the Tube.
Build an airport in Palmdale, how long will it take to get to Downtown LA? How about from John Wayne? Ontario? High speed bullet train is a smart choice for California. The population growth and density requires alternatives to cars and planes.