If you want vintage, here is a pic or three of a wheel we developed for the early aircooled cars, but has been adapted to the late model cars. It features a forged 6061 center and 6061 rim shells. Tested to SAE specs (which it easily exceeded) and very, very light weight.
I can't imagine those looking good on a Cayman. It would HAVE to be a 19+" application and HAVE to be coupled with an aggressive kit and suspension to have a sliver of a chance. Anything else and it would look...well, you know. Just my 2c
hmmm a retro look....it could work and just might with the right size and tire....the pics poster by Jeff work for me - the black on black looks good...it all comes down to taste...and it's your taste that matters and no one else...it's the reason they make vanilia and chocolate.