Pittsburgh fits all of your criteria except getting a job in Southern CA. It's a fun school in a city with lots of universities. it is insanely cheap to live there without being a nasty ghetto (relatedly, it's the safest large city in the US). there are also plenty of big and midsize law firm job prospects. It's certainly possible to take a degree from Pitt to CA, but it will take a lot of legwork. This, at least, is what Pitt grads working in CA report (I am heading to Pitt, but interested someday in living/working in the west).
FWIW, people on law school boards tend to focus on placement in biglaw firms, and placement in one's first job. While both are important areas to focus on, most legal employment is NOT in biglaw. If you can't get a job in CA from a good school out of the area initially, this is not an indication that you simply can't get a job in CA.
If you are dead set on SoCal as soon as possible, though, I would recommend USD before the other two.