Also, prestige is important, it's as important as you make it. It is very real. If you only plan on doing undergrad, then your undergrad's prestige is more important than the grad school you never go to. Trump's kids "studied business at Wharton" but at the undergrad level only but they still use that name to effect.
When I talked to someone at the USC b-school she mentioned regionalism is a factor. East coast schools are better known for business, a b-degree from NYU Stern is nationally recognized and will open doors for you because the network is everywhere. She said the grads from USC tend to stay more in CA, and if that's what I wanted then great, but it was a factor to consider...or maybe it was UCLA...I forget now. :P