Bruno,
I thought about this too. In fact, I'm playing a 5/22 gig where they originally wanted a DJ for a car show. They also wanted my live music, so they decided to have me do both. Should be interesting. I did a trial run at home. The PA800 is a snap with the built-in mp3 and it will go flawlessly, using the Songbook feature. I have 100's of songs ready to play....can even use "play all" and join the crowd -oops, no leaving the keyboard
zuki