I was in the same situation as you - this was my question, and here's my reasoning for choosing PCOM:
LECOM: the 23 and 3.0 sounds very appealing, and from what i've read from other forums, it's basically a guaranteed acceptance if you don't screw up the interview. However, apparently you're taking the exact same classes as the med students, BUT the med students only need to maintain a 2.0, while all of the post-baccs have to hit that 3.0 mark. From last year's class, 40% of the people did not make the 3.0 due to a professor failing around 50% of a class (who i think is being replaced this year). This year's class will probably be different, but who knows. my friend is graduating from LECOM this year, and his advice was, "most medical students in my class were around the 3.0 mark, but it wasn't a cakewalk. PCOM 's biomed will probably give you more options as far as med schools, and LECOM is a one-time shot at our school." In my opinion, if you don't get a 3.0 there, it's a nail in your coffin as far as med schools, because a 2.9 or whatever as a post bacc won't do much.
PCOM: the school and program is well-established. many people/Adcoms know about the program and have a high regard for the school. I know that their acceptance rate into their DO school is not as high as other programs, but this is probably due to the fact that PCOM is top choice for many DO applicants and MD applicants who do not get into an allopathic school. From other forums, it seems that if you meet the requirements as a biomed, you have a higher priority than the other applicants. In the past couple years, it seems like they have been accepting around 15-20 out of the 60-75 from the program (keep in mind that these numbers are due to some people that did not make the requirements, another 1/3 of people that were accepted to other medical schools, and another portion of students that did not apply to med school and went on to be a PA or get their masters/PhD). The one negative aspect that I've heard about this program is that they don't interview the biomed students until the spring (while many other applicants are already getting off of the waitlist). I feel that I would rather have an overall better shot at med schools by doing this program, than have "a good shot at one school" from the other programs. Also, if you don't happen to matriculate directly from their program, you could always stay on for the masters, re-take the MCAT in the summer, finish research/get published, get a committee letter from a great medical school, and have a better 2nd-round shot the following year. (Also, many specialties are requiring publishings in their areas anyways).
Hope this helps with your decision