Should I be applying to more than 4 colleges?

Ok, I've known that I want to study Architecture for as long as I can remember, and I already applied to Pratt Institute, University at Buffalo, NJIT, and of course the Cooper Union. I'm on the honor roll, have an SAT of 1810, all my courses have been AP and college courses, and I have many extra curricular activities and all that good stuff. I also have an extensive portfolio with both print and CAD, and my college essays have been described as great. However, my overall GPA is only a 3.3 (keep in mind I take all advanced courses and challenge myself, and my school does not weigh my GPA). Should I have applied to other schools? Are only three real choices ( Cooper Union is more of a fantasy than anything else! Lol) enough? I'm also applying to two safety schools that are not well known, nor do would really want to go to them, for they are more of a safety net. Should I be doing more?