I've only used my PC on my DVI port on my Sharp LC-37G4U but I've used a Sony Playstation 2 on both the component ports and also S-Video. S-Video in my opinion looked exceptionately poor, but component looked worlds better. That said I always try to tweak my brightness, color and contrast ratios a little bit each time I play a game, use my computer or watch DVDs.
DVI can be very good for DVDs, however I've read that some liked component video the best because the Digital->Analog->Digital conversion will slightly soften the image and clean up any hard pixels.
DVI can be very good for DVDs, however I've read that some liked component video the best because the Digital->Analog->Digital conversion will slightly soften the image and clean up any hard pixels.