Umm...ok. So, last time I checked, most (if not all) of the medical schools in the United States were accredited. I really have not come across a "bad" state med school. I honestly can not speak to the osteopathic education, as it was never really presented as an option for me until I was into medical school and as such I have not done as much exploration as I would have liked, but there are a number of tidbits I have picked up on SDN.
First, I would consider cost. If your state med school is cheaper than the osteopathic school, take a good look at how much you will save. Next, take a look at match lists. Don't forget to consider that going to osteopathic school can involve taking double the number of boards, USMLE and COMLEX. From what I hear, there isn't too much extra prep involved, but it is extra days (at a point in life where time is at a premium) and additional cost. Also, the whole osteopathic internship seems to generate anxiety amongst a number of osteopathic medical students who are considering allopathic residencies (disclaimer: I know very little, so don't ask me to follow up, that is just what I have observed on SDN).
With that said, a number of people have told me that they prefer their "Non-MD" primary care docs to the MD ones they have seen. As an MD student I am curious, intrigued, and really want to learn OMM, but know I won't really have much chance to do so in my education.
Just a slightly different perspective. Good luck in your choices - it's nice to have options, isn't it?