I am overwhelmed. What is the top window on the market today for energy savings and performance. We are building in the Shenandoah Valley in Virginia just 30 minutes north of Harrisonburg. We are building on one of the highest elevations and the house will be exposed to the Northern, Eastern and Southern sun all day. Winds can get up to high speeds. The temperatures are now as severe as those in the Northern Kingdom but we do want to invest in a good window that will be energy efficient and help fading on carpets, wood flooring, etc.