best quality roofing shingles?
We will be replacing our roof this spring. It has two layers of shingles so the roof will be stripped down and replaced totally. We live in Connecticut and our house is in a very shady area so currently moss and lichen are a big problem. I am in the process of getting estimates and am confused by the different companies. Is there a significant difference between them? I will be looking for a 30 yr-lifetime shingle. Clearly the contractor is the most important variable, but assuming I am lucky enough to get a proper job done, is there a big difference between GAF, Certainteed, and Tamko for instance?
I have read about zinc strips to decrease the likelihood of moss and algae but one contractor said the newer shingles are much more algae resistant so the zinc would be overkill. True? Since the cost is relatively inexpensive, my gut is to add it to the project.
My attempts at doing google searches to compare the products has been unsuccessful so I am hoping to learn more here.