Zuki, the best advice I can give you, is to try two Bose Compacts...that's what I did, and believe me, I am fussy about sound.

The stereo sweet spot is incredibly large, and, as Gary has already said, the biggest obstacle, is getting used to the modest sound levels, as they are perfectly sufficient, because of the Bosi's(?) ability to fill the room.

Yes, a tad more fuss, but, I feel it's worth it to use two, and retain stereo.

You can A/B one Compact vs. two, and make your own judgement, but if you're like me, and are particular about your sound, as well as wanting to hear your PA-800 the way it was designed to be heard (in stereo), you might be very tempted to go with a pair.

Unlike arranger keyboards, you will only need to buy a great PA once.

Also, you will automatically have a back-up, as you can always use one system in an emergency.

Ian