[STM34]

I am looking to purchase a Z4 M Coupe this year with the intent on it becoming the eventual successor to my E36 M3 as a street/track car. I have a couple questions and would really appreciate your opinions since you obviously know the car and most likely have driven it on the track:

What is the Z4 M Coupe like on the track, (pro's, con's)? If you have driven an E36 M3 on the track, in what ways is the M Coupe different / better / worse?

I will eventually want to have a rollbar installed. Has anyone here done this? Do you have pictures? Have you experiences any negative ramifications i.e. visibility, fitiment, etc.?

Thanks for any insights you can provide!