
Regarding to the topic, I believe that KI3T doesn't hold up to the original KITT, based on looks. I mean, how can a MUSTANG replace KITT? It's far too boxy. I understand what people says about it being an american car, but I also think that what really matters when choosing a car is its appropriateness. The GT500 is sooo unsuitable for being KITT!
I was thinking that a Mercedes SLS could do the job. I mean, it's awesome, and it's similar to a T-top with those gullwing doors. The only downsides I see are it's price and it being a two-seater. Aside from that, it's next to perfect. A Maybach could also be really good, but it just costs far too much (the Exelero costs about 8 million).
For americans, I'd go with a prototype such as the Ford Shelby GR1, but here we are, facing the seat number problem again. A prototype would be best since KITT must be the "car of the future".
Cheers

EDIT: Just saw the Chevy Corvette Stingray Concept, now that's a hell of a sleek american car! Much better than the 'stang. And waaay cooler, of course.