The choirs/vocals on this unit sound a lot better than the choirs/vocals on the Tyros4. The samples used in the T4 are old ones recycled from Yamahas previous performance pianos/synths. I have the very same on my P-250 - with the switching and all. The Roland FP-4 has some choirs/scat voices - and you guys forgot the VA line marketed as "A Keyboard that sings" with their V-Vocal technology. This is nothing new or groundbreaking. But I must say that I really dig the sound of that operatic female soloist in the PA3X demos - that is one of the best ones I've heard on a hardware unit. Makes me remember the Techno Opera from The 5th Element - that was beautiful!
So if I can get a female backup singer doing the ooos and aaas and not having to put up with the FVS "Female Vocalist Syndrome" - that is a plus in my book

DocZ