I still love my Bose Compact ... hate cats, though. The QSC's are for a more conventional setup where others are singing in my system and I have to really pump alot of bass. The Compact is on EVERY solo job I play, and so far, the only time I use the QSC's with my Mackie CFX12 mixer is for school.
I needed to have a reserve system for ...whatever comes up. The QSC is perfect for that.