Finding independent installer/dealer in NC

[Betty]

I live in the Raleigh/Durham area of North Carolina. I need to replace 8 sets of sliding patio doors which make up a large solarium. (4 of the 8 sets include a blank window also). I do not need for all these doors to open, so could conceivably replace with a fixed alternative to sliding doors. I live in an upscale neighborhood, but only plan on keeping the house for about 5 years, so there is a cost/performance/appearance trade-off. You guys have convinced me that I need to find a reputable independent window installer/dealer. Do you know one here, or do you have recommendations to find one?
Betty

[Windows on Washington]

If you are looking for some sort of payback calculation based on the increased energy efficiency, you will not find a legitimate reason for it.

If it is as a result of replacing a failed building material, that depends on the real estate market and other factors beyond my fingers and ability to calculate.