I have no idea.. lol I don't know enough about the various models.

But I've always liked the 308.

Of course, it'll be moot in the end, because if Ferrari does somehow end up in the game, I'll own them all.
I did some digging.. turns out these very forums are one of the best sources of news on the 'net, it popped up quite a few times on Google, so I came back here to do my digging.
EA currently owns the Ferrari, Lambo, Porsche licenses. Old news. KY has stated previously (months/years ago) that Ferrari couldn't be in GT because of the huge amounts of money needed. This is most likely the fault of EA, since any other developer who wants a Ferrari has to go through EA and Ferrari together to get it. And as we all know, GT is EA's worst nightmare.. the "NFS-Killer" (I tend to agree.. while I do enjoy the NFS games, I find GT a much better game on virtually every level). So EA probably quoted a number far larger than Sony/PD were willing to pay. However, there's also numerous mentions of Ferrari's desire to be in GT, as well as KY's desire to have them. So it seems reasonable to assume that once the deal with EA expires, that Ferrari's new licensing agreement will most likely be a non-exclusive renewal with EA, thus allowing PD to bypass EA entirely and get the license directly from Ferrari at a much reduced rate.
I would assume the same would hold true for Porsche and Lamborghini as well. I've found no mention of those two companies' desire to be in the game, but there are also no mentions of ANY company anywhere who does NOT want their car in GT. In fact, after the success of GT1, manufacturers approached PD with the desire for their cars to be in KY's game. I'm sure that, aside from the current exclusive license, both Porsche and Lamborghini would probably have no objections at all to their cars being in GT, and may even encourage it by offering PD a good rate on the license.
Unfortunately at this point it's all conjecture. If KY is indeed holding out on us, and still has some "surprises" for us in the form of these three licenses, then there will probably be no mention whatsoever of these manufacturers until after the game is released and the cat's already out of the bag.