I'm looking to replace my 6' sliding patio door. I don't need anything fancy or too energy efficient. I just want something durable and not super expensive.

I've been offered a few quotes from different contractors, all are reputable installers.

· Provia Endure vinyl patio door - $2300

· Simonton Reflections 5500 - $1900

· Norandex Extreme 312 - $1675

· Lansing (I don't know the model yet) - $1650

I don't know enough about enough about patio doors. Are these good prices? What is a good middle-of-the-road door that will last a long time?