Obviously your GPA is your application weakness. However, Your ECs are strong and your SATs meet the requirements of these school. I would say that
UChicago, Brown and Upenn are reaches
Vanderbilt is a high match
George Town and Amherst are low reaches
Chance me back 
http://talk.collegeconfidential.com/what-my-chances/1736352-chance-me-please-updated-will-chance-back-if-you-want.html