I tried all "the best" options and realized that digital pianos are REALY hard to reproduce thru speakers in Live conditions. I was a little skeptical about the size of the QSC 8.2, but decided to give it a try, and have to say: Amazing!! Incredible sound! If you are going to play keyboards, use two of them: stereo. Yes. Stereo. I have a Nord Piano 4, and I am not going to kill these incredible piano samples playing mono. I know it is a significant investment but you are going to love it. No Subs needed. For medium to large gigs.