OT: Siding and windows, Need some inside or good info Options

[736conver]

I know how diverse we are here so I figure I could get a good answer through the club.
I am about have siding and windows done on my 1970's house. We have had about 10 estimates done. They range from 15k to 20k. Some guys that came out were just salesmen with a tape measure other guys were workers that move up in the ranks to owners etc..
One guy says this product is better then that one and another says just the opposite. One guy says use the insulated siding another says just put thicker insulating foam board for a higher r-value. I really dont know what to decide and who has the best interest in mind. One guy had an estime over 20k we told him he was the highest and then all the sudden he could bring the price down to compare with the others.


Anybody have any help on the situation.

We are going with a vinyl siding with slide by windows. But we just dont know which person and product to use. There are alot of them.

Here's a website that basically shows all the siding and window options we have. And yes he is one of the contractors we are considering.

http://www.keystonebuildersinc.com/siding/

Thanks for any help
Brian