I had the same delemer when I was thinking of moving onto a Z. I had the ZRX which is an icon, but wanted something new, couldnt find a new one, either the Z 1000 or the Ninja 1000. So after a hell of a lot of delibaration, I looked at it in a practical way.
1 the Z1000 is a top notch bike, no argument about that. But its naked & your in the elimants.[Fine if you dont mind that] Other than that you cant fault the Z1000.
2 The Ninja 1000 same bike, with a few more comfort addition added, for not many dollars.
The seat is better than the Z, [although not much]
You have the protection of the full fairing & the screen adjustment isnt a gimmik, it works
So I thought, if im gonna change bikes Im not going naked, when for a few bucks extra you can get a faired bike with a little more comfort..
So the Ninja got the nod. Hope that helps with your delemer..