I shouldn't have watched that video with Mike Martin demonstrating the Midi Designer iPad app! That triggered GAS / retail therapy, and I just ordered one! Finding the XW-P1 on sale for $399 also influenced my decision. Though I already have the PX-5S, I like the idea of real-time knob-twiddling on the iPad with the XW-P1. That and the PX-5S doesn't have a 9-drawbar organ mode. Off to download manuals, firmware, editors, patches, etc. while I wait a week for it to get here...