Diamond makes a great speaker. It is to bad they stopped making their marine one it was a great set up. They sound very nice and clean with out being overly bright like some people think that they MB Quarts do. The Boston Accoustics sound good as well, also a less bright in your face presentation. The MB quarts and the Clarions are very bright and that can be a benifiet when put in a boat system. Bottom line is buy what your ear tells you to not the sales man or some friend.