According to many people, the G5 is the best type A bus out there.
Since that is not an option, I say for the C2. The biggest reason is safety. If a type A was hit at 55 mph on the thruway, it would sustain MAJOR damage, whereas a taller, larger more heavy duty C2 would sustain damage, but not as bad. Type A's also have some major blind spots that could be dangerous. I'm with Mike on this one, C2 all the way.
(keep in mind.. this is coming from the guy who HATES C2's!)