I used a PSR-550 a number of times with a live band but not with accompaniment because we have plenty of that already. I now use a Yamaha Motif only because I prefer its sound and keyboard feel. If the PSR-2000 keyboard was more solid then I could have been tempted to try that instead. The big advantage for me of the Motif over the PSR-2000/2100 is the integrated sampling which is more useful in a band than are arranger features. But any keyboard ( arranger or not ) that has the right sound can be used with a band. The 9000 Pro for example would be a good band keyboard.