Bvlgari Aqua Marine - not worth buying a bottle, but it is worth seeing how well they captured the salty (very salty) sea air - I couldn't take it on my skin after a minute or so though, and had to (try to) wash it off - it was like accidentally swallowing ocean water and having that taste linger.
Diptyque - Philosykos, of course! Actually, I'd love a bottle. or at least a sample. :P
I've never smelled Acqua di Parma or any of the variations.