Good explaination bleh
That's kind of what I figured but didn't want to assume.
But you can't really compare the Z4 to the 350Z, maybe the Elipse spyder and the SLK230 but not the 350Z. The MR2 should be compared with the likes of Miata as well. Neither car are in the same league as the Z4 (as much as I dislike the Z4) which is luxury convertible.