I really like the hard top that is on the solstice tha was pictured, one thing I might change for the sky would be to make the roof humps a bit more pronounced, kind of like on the roof of the dodge viper. I think that would look nice, and would compliment the humps on the rear deck lid.
However, my favorite so far is by far the coupe/hatch top that EDAG is marketing

. That thing is freakin sweet, like said before, its like a better version of the BMW Z hatch. If it was a simpler transplant, I would be considering one hard for when i get my sky, but I just dont think I could part with the convertible option so early in the game

. I do like the prospect of a hardtop for the winter though, I dont think thats such a bad idea.