In its few weeks on the air, ABC's warmly witty and imaginative comedy series Modern Family has quickly become one of the viewing highlights of my entire week, turning out some of the best crafted bon mots and well-constructed (if lovably flawed) characters on television. In the hands of its supremely gifted cast, the tangled relationships of the extended Pritchett-Dunphy clan are not only humorous but also touchingly realistic. They squabble, they feud, they make up, and occasionally they hit one another in the face with remote-controlled airplanes. The subtle beauty of the humor makes repeat viewing a necessity (blink and you could miss some truly stunning nuance) as well as a pleasure, making the Pritchetts one family that you want to spend time with week after week. (And really, I can't think of another recent comedy family that that's true of, other than the Bluths.) This week's hysterical episode of Modern Family ("The Incident"), which airs on Wednesd