Kelley will start you on the road to being a business leader from day one as a freshman. Emory has a good b-school too but you start in Goizueta Junior year.
USC is well ranked but not in the same league as Kelley and Goizueta IMHO. USC is also a commuter school with a large percentage of people living off campus.
Babson is much like USC for undergrads. As you know, Babson has a great rep for entrepreneurship with its MBA program but I question how many people founding companies majored in entrepreneurship.
All great schools. Visit them and go with your gut. Prestige is useless unless you love the school.