Hi... the DGX660 is an average arranger and a beginner level piano combined: much of the better functionality for multi-track sequencing you get on a Tyros or Genos model (or even the old PSR7000, 8000, and 9000) won't be included, however, it should have a simple to use multi-track system that maybe enough for you.
Whether or not you like the UI (the casio UI is simpler), you'd have to determine by trial. The learning curve on a Yamaha arranger is easy for simple things, complex for the better functions.
prototype pcb
