there are few things to get better video playback. ur display, media player & the video media itself. if u want the best result, u should have the best display, the best player & the best media. ur sony lcd tv is good enough, the best commercial video media is Blue-ray media, so the best media player should be Blue-ray player complete with the sound processing system. the best video interface nowadays is HDMI & for audio use digital optical interface. then u will be happy for the result. u won't have a best audio-video quality with ur system now