What are my chances of getting in to these colleges?

I am a junior in high school, have a 4.1 GPA, ranked first in my cl, am captain of the swim team, VP of Student Council, Spanish Club, National Honor Society, Knowledge Masters, SATs in the mid 600's (from soph. year), will be a definite et to any of the swim teams...what are my chances of getting into (1) UPenn (2) Duke (3) Emory? Do my SATs need to be higher?