<p>I think you have a solid chance - from what i've read on CC, the first generation status should certainly be a bump although you have solid credentials. You didn't elaborate much on your ECs but leadership is good especially if its a "real" leadership position. I can't really comment on the supp. essay thing - are lots of kids doing that now?</p>
<p>I definitely think you are in. People seem to overreact on this board. Your SAT is certainly in the top 50% of accepted applicants and your 3.7 GPA is fine. Especially with all the tough classes.</p>