yeah, I found it to be pretty boring really. A bunch of lame boutiques and clubs. Some very nice food, but its all really expensive. and some hot chicks, but it gets boring pretty quickly. Probably my least favorite place I have visited in FL.
LA can be alright, it depends on what you want to do. I like the beach scene better than South Beach, museums are way better, really can be a lot of fun, especially if you have a car and can get out of the city up or down the coast.
It's a tough call. One thing both towns have is a lot of plastic surgery.
As far as beaches go I'd give the nod to L.A. Malibu, Santa Monica, Venice. Majestic hills seemingly tumbling into the Pacific. Vacuous yet gorgeous babes everywhere. Nice dry climate. Miami from May to October can be unbearably hot and humid.