I wish it was an option as without a shadow of a doubt I'd pick the Alfa 159. Anyways, the new A4, the IS and the CTS are the best looking cars here. The C-Class is boring as hell IMO, just like the 3er. For some reason I quite like the Lincoln as well.
I would pick the Benz. From pictures I thought it looked retarded, but since I saw one IRL, I think its pretty brilliant.