Is the Korg PA 500 better then the (either) PSR s900 or the s700 in terms of
1. Sound quality
2. Ease of use during live use
3. Overall nice setup

?
and by the way, is my keyboard PSR 1500 a popular keyboard for One Man Band? as I notice everyone seemed to be talking about the 3k, and now th s900...?

Thanks.
Shim