I've been rolling some of these ideas around in my head, too. I also have a silver Cayman, so you're doing some of my experimenting by proxy.

(Thanks!)
I like the look of the Techart cars, but I'm struggling a bit with the little black pointed ends protruding into the bumper area--so I haven't gone that route (yet).
Leaving the area that surrounds the lamp is pretty interesting. It's definitely not a "thumbs down."
Smart move to paint the tape. I looked into getting a spare set of spears and my dealer quoted a price of $174 each!
BTW, the spears can be removed separately. No need to remove the top piece.
Thanks for sharing the pics. I'm looking forward to seeing what look you settle on.