Two very nice cars, especially at your age! The Cayman S is a great little machine. A mate of mine has an ugly yellow one! I think a Black or Orange Cayman with black rims looks a hell of lot better! Pros .. It really hugs the corners well, and has a bit of grunt about it ....... Con..... it is a boring Porchse (not saying all are)....
I myself prefer the 335i coupe, there is just something about BMW's, and mini cn900 key programmer
the look of the 335i coupe is sleek sporty and just damn sexy (not to mention the great performance it delivers)!
For a young professional I would choose the BM.....why.....it just makes sense!