I've had a 2006 Touring for a year; and just gotten a 2006 GT Vert!
*The rag top has an inside liner, and so it has a layer of air for insulation. In the cold here in OKlahoma, I have noticed no big problem heating; and so I would suspect no big problems cooling. (Less window surface too) If you are running the A/C at all, you might as well crank up the fan at no fuel cost!

**After having an NT manual tranny; I love the Turbo (less effort on accel), but I prefer the auto tranny - guess I got too old to switch back.
(I just can't break myself of coasting up to traffic lights, and sitting there in 3rd gear waiting for the light to turn - only to be in too low a gear to rip off!