Well Diki, if I HAD a Roland that'd be a feature I'd use, but let's stick to the topic right now, shall we? Boy, you and Fran think the answer to everything is "get a Roland."
You forget - that silent slab of yours has no speakers, no harmonizer and a teeny tiny viewing screen. Not for everyone .. certainly not for me.
Geeze Louize.
Anyway - the Korg addresses that very subject perfectly with the assignable button choices.

And Deane,
Yup- it's that "in your face" sound that Korg is famous for. I love it, but I want the best of both worlds. I'm editing drum styles as we speak. Copying walking patterns into bouncing ones. Make a huge difference for me. Yamaha is so good at "middle of the road", blended sound - your people are used to not having to "hear too much" at once.