I've driven both and I'll have to respectfully disagree here. The Z3 was plenty nimble and along with more get-up and go, it was tighter and less like a go-kart

I've driven both and I'll have to respectfully disagree here. The Z3 was plenty nimble and along with more get-up and go, it was tighter and less like a go-kart (not to knock go karts, I have an e30). Don't get me wrong, the Miata was great, I just don't think it was a Z3. Also, the Z3 M Coupe was the coolest looking car I've ever seen (Clownshoe!). Interesting you would argue the Z3 was heavier when the Boxster (986) was only 100 kg lighter than the Z3 M roadster and the Z3 was basically the same as the Boxster. I've never driven a Boxster or Cayman, however, so I can't comment much further than that.