Forget the excalibur,.that is a low quality window and you wil not be happy. Everything from alside is poorly designed. Vanguard is
a good window as well as Okna. You may want to get another okna estimate from another dealer and
ask about the EnviroStar
800 series. One of the best/ most efficient windows available. You probably have another dealer in your srea/ within 20 miles I would think. just google okna window dealer Nj or ny