What I didn't like about both my Bose systems was the lack of midrange due to the pole speakers,......and the fact that with two systems you have to carry 2 subs, 4/6 poles, cases, etc, just way too much gear vs two powered speakers. Also in big 300/400pp dance gigs you need more subs. Around here I see Dj's using up to 4 Bose L1 subs on each side of the room to accommodate today's music.

Yes in a small setting it could suffice in mono or two in stereo which I prefer....but not my choice.

Go listen....A/B many systems before you choose wisely....with YOUR keyboard at FULL performance volume
good luck.