$85k +/- 5k seems to be the average here out on the West Coast. I'm curious as to what the difference is for people with masters degrees or doctorates, though.
However that is for a 37 hour working week. Most people can add 50% over basic in overtime (for 40% extra hours, due to premium rates).
Northern Mexico is about $30k which, compared to basic cost of living, equates to about $120k in California :)
I don't know about starting salaries, but DC-area hiring is plentiful, and you should be able to hit $100k in a few years (if not sooner). Of course if you want to be under the bright lights, and not spend your career backstage, then: Go west, young man.
(Computational physics, not CS, but still...)