I suppose if someone is playing and space is limited, it would be good to stand. Most arranger players I know sit when they play, including me.

Martin Harris, and Peter Baartmans usually sit during demos, and when you are constantly using pedals (in my case, volume and sustain) it is not very pleasant when standing...plus, if you aren't using the right technique, you can get carpel tunnel pretty easy.

Of course, if you're singing, standing allegedly helps, but that doesn't seem to bother Billy Joel, Elton John, Burton Cummings, Mike MacDonald (Doobie Brothers) and Stevie Wonder, to name only a few...they rely heavily on their voice as well as their playing, and they seem to prefer sitting down.

They seem to have no problems keeping the audience's attention.

Regarding Bose...

I wanted to get by with one Bose L1...but, after spending a lot of time trying to get it to sound right (and getting nowhere), I went with two, and I was glad I did.

Using two also corrected another drawback with the Bose, which is weak mid-range...two towers combined makes up for it remarkably well.

If you can live with playing an instrument in mono, that's meant to be played in stereo, by all means use one Bose...it will save you considerable money and set up time...I guess I'm a perfectionist at heart, and great sound is very important to me, especially since my music is all instrumental, so I had to go with two, and couldn't see doing it any other way.

I'm certainly not going to try and change someone's mind who is perfectly happy with a Yamaha arranger in mono, but it was worth it to me...plus, you only have to buy a proper PA system once.

Keyboards are a different matter.

Ian