One thing about the composites - the heat you experience is in direct relation to the amount of plastic in the final material - ChoiceDek, Trex, Fusion and some other high end brands are no hotter to the feet than wood. Some of the older brands had a lot of plastic and there are even some decking materials that are ALL plastic. You will also experience more heat in a dark decking material than the lighter products. Dark brown, Redwood, etc. vs. white, grays or other light colored materials will reflect the heat - this goes for both wood and composites.