If you are "gigging" you should invest in a good speaker/PA system otherwise you may miss the good sound coming from the BK-9.
I would suggest to try, if you can, a light but clean sounding by-amped system. For example start with a Bose or if you like the stereo sound invest in a less expensive Nano-300 HK Lucas portable PA (about $700). You will not be disappointed.
Claudio