My go-to box for corporate events is the EAW NTL720. For an average show of 1000 people in a 25000 sq ft ballroom, usually 6 hang per side is plenty. It is small, light (47 lbs), has wide horizontal dispersion, very good low freq pattern control, and sounds like a studio monitor -- very clear.
The only thing I don't like is the hardware. The buttons that release the claws which cling to the cabinet above it tend to break, get jammed, or not spring back over time. You have to remove and fly one cabinet at a time rather than a set of 4 because of the latching mechanism -- the cabinets can't pivot around locking pins.
Fly bar is very expensive...$2700 each.
Aside from the hardware, the speakers and electronics have been bulletproof.
JR