The noise generated by a metal roof that is properly installed over a flat deck is no greater than that of a shingle system.
There are colors available that blend in with existing shingle colors. The local building codes and neighborhood by laws should be addressed when considering metal roof.
A new roof is a big investment, typically involving thousands of your hard-earned dollars and lasting 25, 30, 40 years or more. As with any big investment, knowing in advance what your warranty covers could save you thousands in the event that problems arise with your roof.
If one estimate seems much lower than the others, and it sounds too good to be true, it probably is. Many fly-by-night contractors' below-cost bids seem attractive, but these contractors often are uninsured and perform substandard work. If an estimate is confusing, ask the contractor to break down the estimate into items/terms you can understand.
Metal roofing offers homeowners a lifelong solution. It is an investment in your home's future. Over the life of your home, metal roofing is probably the most economical roofing material because it will be the last roof you'll install. Traditional roofing materials have a limited life expectancy before one is faced with the expense of another roofing project.