I second the 365GTB4 convertible. It broke my heart when they blew up the one in Miami Vice, also this was "only" a replica.
Another choice for me would the Jag XK 150 in race trim, like this one:
(there should be a picture here, but they only allow me 40K???? any advice, please? )
OK, so I put them in the gallery.
(fixed the pic links...ron)