help with door

My current entry door is a double steel door with glass (64" total width, doors only). The glass has only one layer and the door faces west so it does not insulate well. I want to replace it with the best entry I can buy.

1. Do you think fiberglass is, in general, better than steel, from quality, insulation, and beauty point of view? What brand do you recommand and its cost? I am looking for ones that offer limited life time warranty. If the door comes with factory baked color of my choice then I'll be really happy.

2. Should I replace it with another double door or a single door with two sidelight pieces? What are the pros and cons for each design? Either way I think I will use small glass openings on the door or side pieces. Your thought?

3. Home depo estimates $500 for double door installation (replacement). I think it is reasonable. Your comment?

Thanks for your help in advance.

 

in the house we just bought, there are some ProBuilt French Doors in the kitchen...the doors are level...i have checked the sides and the tops of the doors when opened...they are level from what i can see on a level...

the problem...there is a gap on the top of the right door that is about 1/4 inch near the hinges...but near the middle of the two doors (where they two doors meet to close), the gap is not there...the right door hits the left door all the way down...i can't close the door without really slamming it...i pretty much have to force it shut...

what can i do to fix this...

michael