Denver siding company is the next most important, because you want the materials to be installed right, and have the peace of mind in knowing that the company will fix any problems they may cause.
Even within the same vinyl siding company, there is significant variation among products. The most important aspect is panel thickness. Vinyl is a very weather resistant material. It is also flexible, and installing siding that is too thin may result in being able to see the wall underneath poking through. I have also witnessed many instances of Denver vinyl siding being punctured relatively easily. The material survives weather well, but physical wear and tear can destroy vinyl quickly, especially if it is of the thinner variety. Only a tenth of an inch more can make a great difference with vinyl, so ask your Denver vinyl siding company for a cost breakdown for an upgrade. Upgrading the quality or thickness of the material should not cost all that much more overall.
Vinyl siding made by cheap companies sometimes stiffens with age, which can lead to cracks. If you pick a smaller company and a unique color, you may be in for some major problems if the siding gets damages and you want a localized replacement. The probability that the same company is still carrying a matching replacement is not so good. So most siding contractors recommend you pick a trusted company in simple colors and design.
The upside of vinyl siding is that it is very clean. Its flexibility allows the builder a lot of room for creating beauty. The range of choices allows vinyl siding to be used in many different architectural building types. Vinyl is the most sold siding because of its weather durability. Rain, salty air, and snow just run off it, and vinyl never needs painting. In fact, it cannot be painted, because liquids just run off. To clean just wash it down with soapy water annually.