Cheshurecat, you are right that that the XW-P1 is almost a modern take of the Arp Quadra. The Quadra had a bass synth (Odyssey based), a poly synth (Solina based?), a solo synth (Odyssey in duophonic mode) and a string synth (Solina II). The XW has a Solo/ bass synth (equivalent to the Quadra Solo/ Bass synths), three poly synths with PCM, Drawbar and HEX being being the equivalent of the Quadra's Poly and Strings mode, plus onboard effects (many more than the the Quadra's Phaser). Of course, the XW-P1 does so much more and has a large amount of effects too, as well as the wicked solo synth filter. Definitely a PCM Panini with a cup of espresso served as well!