Hi Colin,
We have a new classroom building on campus that for various reasons was pre-cabled for wall mounted APs. We cannot move the cabling, so we need to use wall mounted APs.
On the upper floors (fac/staff offices) we are planning to use AP-114s with AP-ANT-1B antenna. For the actual classrooms, where density and bandwidth are more important, we plan to use AP-224s. Classroom sizes range from 30 seats to 350 seats. The target audience for these APs are the room in which they're installed so here I'd say range is probably less important.
Mike