My impression is that the choice is in fact rather limited. And it gets more difficult because this kind of products is rather expensive. There isn’t one keyboard which does it all. Buying several of them could be some kind of a solution, if the resources allow it, but in the same time it can turn into some kind of addiction later. I guess there’ll always be a need for compromises. In my case not having it all forces me to play a $150 guitar of just not to play at all, to go outside, to pay more attention to different things and maybe I’m even feeling better this way, I don’t know.