I am in exactly the same position. I have narrowed it down to two tyres:
Goodyear F1 Assymetric
or
Vredstein Ultrac Sessanta
I am about to order them today and still havnt decided !
I has the Vredstein Sportrac3 on the front of the Corrado and was blown away by how good they were in the wet. They were as good as any other in the dry.
So i am very tempted to give the Sessantas a shot, but they are very different tread design than the Sportracs. They look pretty cool too ( Italian design on an Alfa.. ). Thing is i am buying 4 and its a lot of money if they are crap.
I had thought about getting two of each and swapping them over after 12 months for a proper comparison !
I guess i'll take the plunge later today. Will let you know what i do and how i get on.