I'm looking at watches right now myself, so I am following the other watch threads closely. The other day I tried on Omegas and Rolexes, then yesterday Cartier. Automatic is important for me this time as it is what will set this purchase apart from my other watches. I am leaning towards the Cartier Ballon Bleu. I think it is strikingly beautiful. I would be happy with a Rolex too but, at the moment Cartier is speaking louder.
Good luck with your decision. I'm looking forward to seeing what you end up with.