I'm running NT-05s on my Z06--285s front and 335s rear. The Corvette community has been all over the NT05 since it came out.
Great traction and ride in the dry, pretty good, but not as good, in the wet. Not expensive. In sum, a really good tire.
Some reviews of Corvette owners can be found here. YMMV, of course.
http://forums.corvetteforum.com/c6-z...-break-in.html
and
http://forums.corvetteforum.com/c6-z...05-review.html
Jim