In general:  MD over DO any day.  I'm a fan of OMM (to some degree) but it's benefits do not outweigh the extra obstacles one will face as compared to the average MD, from the lowest tier of MD schools.  
Specifically:  Too many variables to say.  Location, finances, family, future goals (which could change), school's clinical rotation availability, etc.
Clinical Education! This is something that is all too often not given enough weight by pre-meds.  I know I didn't look into it enough.  A handful of DO schools have the reputation for stellar sites and most if not all students receive a pretty darn good clinical education at such places.  Then there those schools that have some pretty dismal rotation selections.  And there are even those schools where some students in a class end up in great rotations while others find themselves at community chop-shops where they're sent home early on a regular basis asking themselves what it is they are exactly paying for.  Be sure to know which schools fit into these categories (especially the latter) and steer clear of those with rumors of subpar clinical education.  
REPEAT: steer clear of schools with reputations of subpar clinical education, regardless of what their match lists look like (which can be deceiving), how great their board scores were (also deceiving when they preselect who gets to sit for the exam), or how much money you'll save going to said school.  DO YOUR HOMEWORK! 
You can probably get to where you need to be at any US medical school, DO or MD.  But I did say need, not want.  Mick hit it on the head.  Just know what it is you're getting into to.  (Rant over)