I don't have any Samsung TVs, but I got 2 toshiba LCDs,46" and 42". My 46" is already 2 years old and this is the first batch of toshiba that came out with a Full HD. My 42" is RV500. So far okay naman sila. Have encountered no problems at all. Both have good cable reception naman. DVD performance is quite good and the Blue Ray performance is really good.
The colors are quite okay, but one thing I notice about Toshiba is that their color tends to be more on the pinkish side. But if you have it calibrated, naayos din naman. What I really wanna see right now is the new model of Toshiba which is the ZV600. Kaso wala ako makitang naka display sa appliance centers eh.
As for Samsung, I cannot comment much, kasi nga wala naman ako Samsung.