I agree, the Testarossa looks better in red, but the 512 TR looks better in yellow. As for the 355 and 360 I like them in yellow too! Red is cool, don't get me wrong, but I think you have a really special Ferrari when it isn't!
Just saw a blue Testarossa and that is awesome too! Maranellos and 456s are better looking in non-red colors in my opinion.
Niels