You have two excellent schools on your CV and good working experience - you probably have very good chances of getting into top schools. What you have to remember is that at the doctoral level, SOP and the 'fit' with the faculty matter as much if not more than your qualifications and work experience.
You have plenty of time to think before the Fall 2012 Admissions cycle. Go to the schools' websites and study them carefully. Perhaps, there are universities other than Ivies that are great for what you want to study. Perhaps some Ivies don't even offer what you need.
Also, if you could take GRE again and hopefully improve both your scores (which are ok, or even good, but not top), it would make you even a stronger applicant.