I am not a Porsche fan but it is a capable car from what I have heard. It hasn't aged well but the most recent edition does look stunning. The video you are referring to Will is one made in Japan where they raced them all, clearly driver skills have a lot to play as much as the cars but the Boxster in that race was the non S version so a 2.5 flat 6 and cannot compare to a Zed with a whole extra litre to play with, the S which is a 3.2 clearly puts it much more on par with the Zed.
And yes, a roadster can handle, as someone mentioned if its built as a roadster then it will handle well, the best handling car on the road the Lotus Elise is a roadster...
Matey boy in the garage remember is basing his entire conclusion on comparability on a sample of one, anyone else here when buying cars look at just one review or corroborate it with 20 others?