Jim,
I wasn't satisfied with the Bose Compact in mono...and, when I love what I hear, I always play better...hence the two Compacts.
They aren't as loud as the two L1's I just sold, but they still fill a room like no other system, and my keyboards sound great...the stereo effects, like chorus and rotary, as well as delay, sound like they should.
Your PA-800 would sound awesome through two Compacts...ya gotta try it, before you dismiss it.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.