I am looking to build some real high quality front channel speakers. They must be bookshelf and I am leaning towards a D'appolito design with front ports. My goal is imaging, good midrange, output and extension from a small (18 high, depth is not a consideration) cabinet. Also thinking of a 21/2 way design to acomplish this. I have unlimted access to a cabinet shop. Please point me in the right direction. Thanks.