Casio CZ/ VZ/ FZ - Pro Series

I'm going to sell my CZ-3000 and "upgrade" to a CZ-1. I'm absolutely 
thrilled with its sound and also its rugged construction.

I know the CZ-1 is built well enough to be used as a gig master 
keyboard but I'd like to know about the velocity and aftertouch:

1. How is aftertouch - do you have to press it down like a madman or 
is it responsive (I have experience with Korg DSS-1, and it's too 
hard for me). Casio doesn't strike me as a "softie" - hopefully I am 
wrong.

2. How's velocity? A sensible curve, or that all-too-familiar "full 
or none"?

3. Is the keyboard mechanism as good as on the CZ-3000? You might be 
surprised, but I love the feel of the keyboard.

4. Are velocity and aftertouch prone to failure? Any other common 
problems?

Thanks in advance, and long live the CZ-series!
Saso.