Chris:
I am a PA of 5-years and I am here to tell you that in my opinion, PA school should NOT be an alternative for those who cannot get into medical school.
The reasons are two fold. First of all, I doubt you will ever really be happy by settling for "second best". Take it from someone who has been down that road and is now studying for the MCAT ten years after having Orgo., Physics, Bio., etc. This is not to say that being a PA is second best in general. It is only second best if being a physician is what you wanted to be from the begining.
Secondly, don't be so sure that getting into PA school is going to be any easier than medical school. In most cases, medical school applicants are not as strong as other applicants because most pre-meds don't have much in the way of clinical background. PA schools are looking for nurses, medical technologists, EMTs, etc. who have been in the health care field for years. Amongst those who do have this kind of background, the competition is still very tough. In 1993, when I applied to SUNY @ Stony Brook, there were 500 applicants for 40 slots. The applicant pool has increased significantly since then while the classroom size has increased only minimally.
In my opinion, your stats are such that with persistance and the willingness to travel anywhere for medical school, you will eventually get in.....somewhere. It just takes a decision on your part that you ARE going to do this and you will do what ever it takes to make it happen, be it take extra classes, MCAT review courses, volunteer in hospitals....whatever.
Good luck to you.
Chris