Good cosmetology schools?

I currently go to a university and have always wanted to be a cosmetologist but I didn't think it was something that I really should do. But after a year and a half at the university I find myself thinking about it more and more and realizing that I should do what I really think will make me happy. Now I'm looking into schools in either Chicago or Denver. I've been looking into Aveda Institute. Does anyone have any advice on that school or other schools?