Interesting concept for a thread. I like it.
Realistically, I would just buy an adventure touring bike. EDIT: I would still keep the Z! I have the Z for fun, and an adventure touring bike would be my key to off road and touring in one bike.
Unrealistically, I would own a dirt bike and a sport bike and a touring bike in addition to the Z. The touring bike would likely still be off-road capable.
The good news is that I still think the Z is the right choice for me if I can only have 1 bike, and at the moment, I can only have 1 bike.