I for one would have no interest in moving to Los Angeles. I often feel like the Japanese have an inferiority complex about the US--like the way so often when someone has an apparently incurable disease in a manga, and then when the risky treatment comes up, it's from America--either they have to go there to get the treatment (and it never mentions the previously well off family now being on the run from Yakuza loansharks) or some brilliant young surgeon learned about it in America and has come back with it. Really I don't think Japanese medical technology is behind North American medical technology, but it's never just some hotshot from the University of Tokyo, the American mystique demands it.
Of course, if your thing is rock music, I guess the US is genuinely the place. Not to, like, make it big because nobody does any more, but at least to experience ambience, go to cool clubs or what. LA might be a good place for that, I guess? I don't know what cities are happening these days. Austin?