I think you have a good chance because you have a lot of clinical background and know what it takes to get by in grad. school. Your GPA's are excellent. I would apply to many schools and pick the one's that you like the most. It isn't always about what the schools think of you, but what you think of the schools. If you are not happy with where you go, you will be miserable. I would look at location, board scores, rotation and residency placements, grade stats, and program benefits (computers, PDAs, health insurance deals, new facility, faculty standing, research opportunities, etc.). I think DO schools, and MD schools, are very open to the non-traditional student because of your experience and your dedication (meaning you know what you want to do and what it takes to do it). Good Luck!