When I reviewed Toshiba's TW40X81, the smallest (40-inch) RPTV in Toshiba's first full line of HDTV-ready sets, I raved about its picture quality (SGHT, March/April 2000). I was so taken with it, in fact, that I bought the review sample. I still use it, but a lot of video displays have bobbed under the bridge since then, and Toshiba is now two generations beyond that earlier design. The company's smallest rear-projection set is now the 42-inch-diagonal 42H81. But the 50H81, at 50 diagonal inches, is only slightly more expensive, and has the advantage of a significantly larger picture in a still (relatively) manageable cabinet. Like all HDTV-ready sets, it can display hi-def broadcasts, but only with an optional, outboard HD tuner.