If you are female, there are several high-quality colleges that are 100% meets need schools and will likely offer you a lot of financial aid. Look at:
Wellesley
Barnard
Smith College
Mount Holyoke College
Bryn Mawr
These have the advantage of being a bit easier to get into (because of the self-selecting applicant pool) while offering the same caliber education, same reputation, and same caliber of student (per SAT/ACT/GPA) of peer co-ed schools. They are often closely integrated with surrounding co-ed schools so you can meet men.