"which one has the best business program for undergrads?"
You mentioned finance, and Michigan, Texas and Berkeley are ranked 3rd, 4th and 5th respectively for finance majors.
Undergraduate business specialties: Finance - Best Colleges - Education - US News and World Report
"Which one will give you the most job opportunities after you graduate?"
I know UT has the biggest job pool of any university, and that a lot of employers ask to see only McCombs students when they go there. Michigan might be more relative in the North and Berkeley in the West, though.
"And if you graduate from one of these schools, are any of them good enough to surpass the regional barrier for jobs afterwards?"
They all send students all over, and they all (as with most universities) send more students to the local region. Anyone in the US that knows anything about business schools should know all three.