I wouldn't say the Bose are ten times better...but, they achieve what a conventional speaker system doesn't do...fill the room.

Now, if you don't want/need this feature or your gig does not warrant room filling sound...sometimes the people want to sit away from the music, for instance, then conventional speakers are the ticket...I have a pair of Yamaha MS60S powered monitors for jobs like those.

But filling the room with a nice balanced sound, with a very wide stereo sweet spot, if you go with two, seems to be the Bose's forte....not many other systems can do it quite so good.

Considering most players will keep a sound system through the course of several arranger changes, it is a good investment, in my opinion.