A quick FYI - we used Dave Ash out of Fuquay Varina. He installs
West Windows out of Martinsville, VA and is charging us about $263 per window, totally installed for Low E2, argon windows, with panes, double locks, etc. I checked all over and he was the cheapest - about 1/3 of what Sears and Champion quoted. PM me if you can't find his telephone number or need more information.