[look 171]

I have never installed any of the Marvin Infinity products, but a ton of Marvin or their Integrity line. The fit and finish on their Integrity is pretty dang closet to their top end Marvin windows. A solid product for sure. The beauty about the Integrity is that wood can be had on the inside (like that look and feel for older homes) and fiberglass outside. Can be painted and performs pretty well. In my own house, I have Marvin windows through out the first floor and their Integrity line on the second to save a few bucks. The first floor windows are more then 15 years old with no issues but one. The locking handle to the window has a stripped screw. That can be easily repaired. I have never had any call back from any of our clients on windows we installed over the years. I stay away from some of the cheaper products to prevent that from happening.

At the end of the day, all three companies you mentioned are pretty close when comparing their upper end windows or doors. Kolbe and Kolbe also make a good product.