First of all, congrats on the acceptances. This is what I call "a good problem to have."
All 3 schools have something to offer you. I think it's up to you to figure out what is the most important factor. B-school lesson #1 priortization
Fuqua - If you want to go into healthcare, Fuqua offers one of the BEST healthcare programs in the country (maybe the world). HSM has so much more resources at its disposal than the rest of the daytime MBA programs. There's also a decent entreprenuer program here.
McCombs - If you want to do energy. McCombs will probably offer you the best connections, especially if you want to go into traditional energy like Big Oil. McCombs is also known to have a good entrepreneur program. I believe there's an on campus incubator. The plus side is that you also get $100K to boot.
Anderson - If you want to live in SoCal, Anderson will offer the best connections. However, if location is the primary concern, you will be able to get a job in SoCal out of the other to schools (pharma recruiting from Fuqua, and alternative energy developer from McCombs).
As far as prestige, Anderson and McCombs are both regional schools and are on par with either other. Fuqua's brand carries well in the East Coast, but gets weaker as you move West.
Bottomline: You can't go wrong with any of these schools. If I were in the position, I would take the $100K from McCombs and never look back.