Remember, there is no coverall answer to this question. What is important to you? Location? Cost? Residency affiliation? Reputation??? From what you've stated, I'm guessing that reputation/prestige is something you are interested in?? In that case, my answer would be: CCOM = OSUCOM >>>>> AZCOM. CCOM is one of the original, established as anything, and really well known and respected in the area. OSU is a state school ... which really speaks volumes for a DO program. It's also connected with a big undergrad (IE money), and everyone is going to know 'Oklahoma State' (just don't tell people from TX hahaha). You'd be fine at either of the two. However, if you get instate tuition at OSU ... do not pass this up.