We install many types of windows and doors and work with each home owner on choosing the right products for their project. One of the top manufacturer's we recommend is Thermal Industries, Inc.  http://www.thermalindustries.com/.  Thermal Industries Frame Features Include:

• Solid vinyl construction with superior insulating value                                                  
• Fusion welded frame and sashes for maximum strength and energy efficiency 
• Colors: white, earth tone, safari brown or wood grain options in oak or pine.

  Simonton windows are also popular since they come in colors that match darker colored homes, such as the Clay or Driftwood window frame colors.

  We also replace many patio doors, often using the Legance Patio Door from Thermal Industries (shown in photos below.) And, we are experts at  replacing curved windows, such as bay windows.