I think tint looks funny when the top is up. Complete the job by tinting the windscreen. I hear regular tint doesn't stick, so how about this:
http://cgi.ebay.com/GRAY-Transparent-Vinyl-with-adhesive-24-inch-x-10-ft_W0QQitemZ8220893285QQcategoryZ3099QQssPageNameZ WDVWQQrdZ1QQcmdZViewItem
I'm one step up from a limo tint, which looks great with the hardtop, IMO.