Looks like the Z series adds the ability to use the "black box" for data recording similar to eagle tree. I think the prices (if mike gets them) will be a bit lower than the converted euro prices, as they were for the previous models.
I almost bought one a few months back. They were listed in the planes controller and I asked Grisa if he could do one for car and he said yes. The price and the problem I had with my other MGMs made me change my mind.