Very good thread ... I'm also a late buyer of XW synth (P1 in my case), I've bought one of the last exposition models available in France. In Europe, the XW keyboard line have been discontinued but you still find traces of the technology on the website (http://www.casio-music.com/euro/instruments/technical-insights/xw-technology/). What I understand on casio catalogue is that they prefered to focus on digital pianos and they are very successfull on that way so I can't blame them ... But I see that casio america supports the XW way longer than europe, and I'm quite sure that is because they truly love their instrument and have always cared to find it a special place (you should take a look at the XW page on facebook). Maybe due to a global strategical change, they just couldn't continue supporting it as much as the privias. It is true that it is quite frustrating to see part 1's and no part 2 in the tutorials or instrument sets but we still have a lot of youtube videos and a supportive community. As for the positioning between the XW-P1 and the PX-5S. I clearly see the PX-5S as a mix between classical digital piano line and XW technology. It borrows the hex-layer and some automation (arpegios and phrase sequencer) and enhanced them (I'd really like to have resonant filters in the hex layer on the P1). But casio showed as well that P1 and PX-5S complement very well, the XW monosynth and step sequencer are unique in casio line and it seems the drawbar organ of the P1 is much appreciated. Concerning the XW-G1, it is really a league on its own and I'm sure you'll love it. Its sampling and looping capability are very interesting and I'd love to have the same level of control over the monosynth without using ipad or windows applications. It is too sad that this keyboard haven't met its market. It seems to me that PX5S holds the legacy of the P1 and that casio is trying to better fit the market of the G1 with the PD1 (which does not convince me)