i decided to go with the Okna 800 series double hung windows with double pane lowE and argon gas. we paid about 580 per window. another Okna dealer was about the same price but we went with the first contractor. we also saw Gorell which we like alot as well and Elements which we liked as well. we also saw a company that advertised windows for 189 installed but after seeing the window it was obvious that it was total junk and the company only uses that window to get into your home and sell a much more expensive window that still was lower quality.
the Okna was very high quality,highly engineered and seemed to have the best performance numbers.the Gorell and Elements windows were very nice and high quality as well. Our Install went very well,it was all done from the inside of our home. they used foam insulation rather than fiber glass. We are very happy with our decision and we learned alot from the Pro's on this board. One piece of advice for other home owners,beware of window companies offering windows at very low prices. that will be a very costly mistake..spend the extra money for something that will last. have a wonderful holiday season.