Quick Comparison
I have seen the previous year's Samsung 30" widescreen, Panasonic 30" CT-30WX54, and Sony 30" KV30HS420 side by side, connected with coax cable from a satellite source. Hands down, the Panasonic is the best at displaying this non-HD source. It provide a clearer rescaling of the picture to fill the screen compared to the others, which show quite a bit of noise and distortion that the Panasonic doesn't show. Haven't yet been able yet to compare these with HD source. 34" models neither. Just to note though, the Panasonic CT-34WX53 (last year's model) is worse with non-HD than the current one. They must of upgraded the scaler inside... now I remember, they're calling it the p^3 chip. It's on all they're TV's now.
Mark