Everything is hot as fuck down here.

Convertibles are cool, unless you think you'll be sitting in traffic for more than 30 minutes and you don't like skin cancer. I'd rock an S2000 down here if I had the cash.

Um, other than that, depends on where you're moving to. In Phoenix, anything you drive in LA will do. In Tucson, get something comfortable to be in traffic in, something that won't get water in it's intake from the monsoons (puddles get river deep), and something with a hellified alarm system that shoots unauthorized entrants in the nuts.