Hi Dave,
Out of the two schools mentioned I've only been to NAC so unable to comment on OBA.
However I do know of someone, now and airline pilot, who did his PPL at OBA around seven years ago and had a great time.
I was at NAC last July for a month for a couple of FAA courses. Good school, decent aircraft (I was flying the Warriors and Arrow) and a nice atmosphere between all students and instructors.
Best wishes,
Charlie Zulu.