Hi - Over a year ago, I bought a Kurzweil SP7 Grand, intending to use it in live stage musicals. The sounds were great, and I was able to change 8 different sounds on the fly, with either one or all 8 sounds together. It used a group of large white buttons to mute and un-mute the different. It was great until it wasn't. I discovered it had serious flaws and crashed almost continually. My question is: is there another keyboard/stage piano that has great acoustic sounds, with up to eight played at once, using the same idea as my failed Kurzweil? Any suggestions much appreciated. Bo