The NSU affiliations are really loose compared to some others, and going to school there really doesn't off you that much of an advantage. If you wanted to go to the PCOM surgery residency, though, it would behoove you to go to PCOM because they almost always choose a lot of people from within. But it doesn't matter all that much with most of the NSUCOM ones. Plus, I would never want to match in south Florida because the pay there for residents vs the cost-of-living pretty much sucks. There are a lot more lucrative paying residencies.
I chose my school for some very specific reasons. I went to Lecom Bradenton. When I started there had never been a graduating class, so a lot of people were leary about it. But, they had success with the PBL program in Erie and I was willing to try for a number of reasons. First, the tuition and fees were only 25 grand a year. That's only 4 grand a year more than my two in-state MD schools were and I was willing to pay 4000 more a year to have four days a week that I went to school for just two hours. Both of my in-state schools had lecture from 8 to 5. I wouldn't even consider NSUCOM because the tution was too high and they had hours of lecture every day. I could have just stayed home and gone to one of the MD schools.
I never cared about affiliated residencies because I knew I could get something I liked if I worked hard. I interviewed at 13 places (turned down a few because I was tired of interviewing) got my first choice of residency and ended up being medicine chief resident. I turned down a LOT of offers for attending spots and I signed a contract with a really good hospital and pretty much got everything I wanted in the contract.
I really, honestly don't think it matters much at all which school you choose. You should choose one for your own set of reasons and pick a place where you will be happy. Happy people tend to be more productive. Med school is tough. Three students got divorced during my second year of med school because it can be really hard on families. Residency is no cake walk either. You work longer hours, study harder and longer and have the added pressure of being the person who could responsible for killing a patient based on a few seconds of poor judgment.
In osteopathic medicine there is no Harvard. Just go where you feel happy.