Thanks Mike for pointing out the CT-S500. 👍
I know this model and think that it is technically the best device (Bluetooth included, better polyphony, the good sound of the CT-S1, outputs, etc.) and that I could well afford it and that it is worth the price. I therefore almost feel a bit "guilty" when I say that I just don't like the look of the device at all (too many buttons and knobs, too many colours, etc.). For my boy, the CT-S500 would certainly be the best device. For me, that is, for pure piano practice, it's just too technical and too distracting. But I know that this can be seen as a "snobbish" argument. 😄