Having done both a stick built and a metal building, my recommendation is for your 2-car size garage to go stick built.
As the previous posters noted, you can do the stick built yourself, perhaps with a little help and rental machinery. It is also easier to find help (friends, relatives, etc.) that are familiar with stick built construction. If your project were larger, I would have a different suggestion. As far as a roof goes, architectural shingles are a good choice, since they are quiet in the rain, last a long time, and look good. If you decide to go with a metal roof, I would recommend a standing-seam style with no exposed fasteners, since I have experience with the screws leaking, despite the rubber washers.
A metal building is more practical for large buildings with higher walls. A steel post-frame building will have more usable height due to the lack of trusses. Metal is cheaper to build for a large volume building (length x height x volume) while stick is cheaper for small buildings.
Steel roofs are not very loud if you have insulation under the metal, and at R21 or greater is not an issue from my experience. I have an old machine shed that has corrugated aluminum roofing and it is very loud in a strong rain storm, but the noise is not an irritating sound. My house has a cedar shake roof and it can be noisy in a strong rain storm if you are upstairs.