The link below may help in your decision......

Here is a link that might be useful: Doors

If you are in an area where storm doors are commonly used and you go that rote as well, make sure the storm door has an operable pane that you can open as facing the sun in the summer will allow a tremendous amount of heat to develop between the storm door and the entry door that can lead to damage to the entry door.

Thank you for your replies.

The door site gives good information about materials!

Good reminder about the storm door, we were told not to put a storm door because of the heat, as you mentioned.

While the door site gives good information about materials, it says nothing about the code required energy ratings for doors.

Door installed in calirose's location need to be energy rated at at least a U-40 to provide maximum insulation value in summer and in winter.

You need to examine the literature or sticker on any door you choose for energy rating first and materials only secondarily.

How well the door is insulated will also help to determine just how well the door materials will perform in your climate zone...and how well it will do is saving you heating and cooling energy dollars.

Look for energy rating first, and only then, materials secondly.

Less glass and more insulation will provide you with a more efficient door.

Thank you Manhattan42 - I hadn't seen any info on insulation values. I will definitely make that my first priority.