Near Full Range, Highly efficient Stand Monitors?

See thread above titled: "Pros and Cons of built-in amps?"

Dear Drew, True in most circumstances until you discover a properly designed transmission line and flat piston driver. Manufacturers tend to ignore such a complex implementation in favor of ports and infinite baffles. These are much easier and cheaper to make and are what the public are accustomed to expect. Subwoofers are now popular with the home theater crowd but for those of us serious about our critical listening habits they are too difficult to integrate properly into a seamless whole with disparate components and untreated rooms.