Everything sounds pretty phenomenal, I really suggest looking at the joint engineering program at Davidson College. The program allows you to acquire a degree at Davidson, but then transfer to Columbia for an engineering degree, as long as you complete all the prerequisites at Davidson first. From what I’ve read it seems like a pretty interesting opportunity and I think you should look into it. I’d suggest studying more in the reading and writing sections and try retaking the SAT once more just to really give your app that extra vamp. in my opinion your EC’s look great, so I think you should really check out the dual-degree program. heres the link: http://www.davidson.edu/academics/engineering