Well putting the price aside for now, since I still don't know what it will actually cost. The demos sound good. I do hear some of the SD1 and the SD5 in the Auyda, but it would only be natural since they were all produced by the same company. The one guitar that I heard in the Bolero does sound different (better) than the X1 and SD1, it more like the SD5 guitars which were a big improvement than the older model ketrons. Until I get my hands on one, I can only go by what I hear and compare it to the all of the Ketrons that I've owned, which I can say that every model has been an improvement from the last. I'm hoping that it will be around 3500-4000 and I'll pick one up.