I've scanned this thread with some interest and maybe it's just me but after having spent the last couple of weekends around several Caymans, Boxsters and 997's my personal take is that the Cayman is the best looking from the majority of angles. The bulbous roof is hard to notice from real world angles as Scott said and the rear styling is by far the most aggressive IMHO.
Actually, dare I say it but I think it's one of the best looking Porsches of all time fog lights included. 
You guys (myself included) are all getting too old... I mean really is the 240Z a styling benchmark for the 21st century???
Now if I was in the market for another Porsche and looking to drop $60K plus it probably still wouldn't top my list but it would be up there.... 
Let the flaming begin...but before you do I'm getting in my '73 and rolling up the windows