I pretty much concur with all of Don Mason's assessments. The Technics KN boards biggest strength is its Big Band & Jazz styles, and that it BEST recognizes in 'full keyboard mode', jazz piano (chord recognition) of any other arranger currently out there. The reason I love the Yamaha PSR2000 (as well as the 9000pro) is because it includes a good cross section of usable styles that compliment (yet don't outshine & compete with) my live' keyboard playing . Ketron's impressive SD1's styles 'knock me off my feet' with lots of punch, and are terrific for contemporary pop & rock, but seems a bit too 'in your face' for more traditional lounge jazz & older classic standards (my specialty), which require more rhythm section subtlety. I imported my favorite custom Technics lounge-jazz styles into my Yamaha PSR2000 so now feel like I have the 'perfect backup band'in a 'single' box. Will I remain satisfied with my PSR2000 or eventually add the Ketron XD9 or SD1, and/or the Technics KN7000/Yamaha Tyros? Only time will tell, but hey, for now, I still love making music & gigging on my PSR2000, and isn't THIS what's it's all about? - Scott