What are the best websites to evaluate and compare restaurants in the US?

"Most Reviewed" for popular restaurants, "Highest Ratings" for well-received restaurants, use the # of reviews the popular restaurants as an anchor for had to evaluate the restaurants with the highest ratings. For example, if popular restaurants have ~1000 reviews, then well-received restaurants with >4.5 stars and >200 reviews is pretty good. A restaurant with 5 stars an 20 reviews might not be as solid.