I use my DX daily in the front window as a GPS. It gets really hot. I wonder how hot the HD will be? According to wiki: Molding a thin layer of carbon fibers significantly improves fire resistance of polymers or thermoset composites because a dense, compact layer of carbon fibers efficiently reflects heat If the DX gets hot from the sun (yes), it might be cooler on the dash than my DX. If CF is heat resistant, then maybe it won't let heat out. That would be bad. I think the CF will be good as in the winter, my phone is less suceptable to heat on the dash. So most the really hot DX issues has to come from baking in the sun. Any thoughts? I'd get white, but that throws a nasty reflection on the window.