Mark, My opinion--- I had the JBL 15 powered speaker, it was stronger than my JBL 10’s -- had more bottom/bass but I found it too harsh. After one year I had to get rid of it, no matter what I did it lacked the quality of it’s smaller brother. – That is my opinion, you need to listen yourself.

Another thought about the JBL10’, over the last five years they have held their price – the JBL15 has been offered for less at times. I am not sure that’s good reasoning.

100 to 150 people, no problem the 10’s–with my sub it does more than a good job. Like Fran said, the look of a speakers on stands on both sides of you does give a pro touch.

John C.