i had a psr-540 just to fuck around with until i could strap the dough for the motif and it was....well.......not professional i should say....maybe for your kids or something but nothing to make quality shit outta....i picked the 540 up for 150 from a homie who came up on it....slanged it for 250 about a year and a half ago...i don't know what you trying to do..but i wouldn't try to make nothing serious with the 510...peace