Hey, we're all just here to help! You never can get too much information.
Here's what he asked:
"As far as I have seen the Yamaha 9000pro registrations can be navigated with a pc-keyboard-numberblock. Is that true? What is it like with the Yamaha 2000?"
. There are certainly other choice to Yamaha, but I don't know any others, with the exception of Wersi (which costs more than a car) that offer direct connection to a computer-style keyboard.
DonM