As a 4th year right now on the interview trail for residency, I would agree with many people that resource is the most important quality that you should look for. And the most important resource that you should look for it the quality and availability of clinical rotations. The first 2 years of med school, really, can be done anywhere. I did very well for my written boards both USMLE and COMLEX and I only attended mandatory classes. The rest of the time I just watched recorded lectures. It is the 3rd and 4th year that will make or break you.
So, I would advise you to go to schools with strong state support and, if possible, have attached statewide campus system. WVSOM, NYIT and MSUCOM came to mind immediately. NYIT and MSUCOM even have the long track record of history to back it up. So I would say that they are very good.
The DO schools are so unfortunate in terms of clinical rotations. Many of my friends that attend the newer schools were shifted around so much for their 3rd year that it was almost as if they attended one of the lower-ranked Caribbean schools instead of stateside! Someone I know even told me that he did not even have any experience with internal medicine inpatient by the end of his 3rd year and that is just plainly wrong. You learned so much medicine on the floor!That is also one of the reasons we as present students really hate the AOA right now for accrediting so many schools without care!
Lastly, as another piece of advise to people, it is really misleading to look at match list as it doesn't say much. It is more or less depending on the personality of the class. The Class 2019 at my school went all out for surgery and most of them were happy with what they got. For me personally, you could never pay me enough to stay in OR even as a gas!