[Brian in Tucson]

I spent the money and bought a used 03 top with the glass window. Love the glass, hate how hard it is to put in any sort of service position. It was a grand, cloth in good shape, and already framed up.

I know, not what you wanted to know. I suppose if you have any question about whether it's warm enough put on the heat and get the interior hot. Then get out and feel the window, and then go ahead and put the top down.

And it won't hurt the top or plastic window to leave them stowed. I probably wouldn't be real comfortable putting the top up in cold weather.