I played the PF1000 at Guitar Center last Saturday. It is basically an arranger version of the PF500 with 320x240 display. I think of it as a portable Clavinova, boasting Yamaha's triple-strike piano sample. It may be the lightest piano that comes with the three standard piano pedals. At GC, the ticket price is $3k, whereas the PF500 is $2K. The PF1000 and PF500 have speakers that point upward from areas where we might otherwise want to stack piano music or drinks. Flash memory is only 1MB, if I remember correctly.