My new Z,  

We have had 5 different E85's I think. We are down to one now. A 2007 Z4 3.0Si. We had a red 2006 M roadster at one point with the S54 motor. While it was really fast, the 3.0Si is nicer to drive at a moderate pace.

Did you made those doors yourself or you bought them? Whats the name of this kit?

Nice looking car.  I've got a 1977 with the exact color scheme.  I thought mine was in good shape but your interior has been taken better care of.  I want to keep mine as close to original as possible but I'm having a heck of a time finding the off white interior for it.  Most came with the black interior unfortunately.  Best of luck.