I have just returned a UE46H6320 which to put it mildly was a big disappointment.We replaced a Panny 42" HD ready Plasma which was 5 years old.
Picture quality was very poor, Main source is a Humax PVR upscaled to 1080 P. Freeview HD was reasonable, normal SD poor, Now TV box 720P putting it bluntly terrible. I spent a long time with the settings and stiil could not get an acceptable picture.
Big thumbs up to Richer Sounds who after 8 weeks and an engineers report agreed to take the TV back.
I have replaced it with the UE48H6400. What a differance. We are totally blown away with the picture quality, Humax, Blu Ray, Now TV box all are supurb. Watched Wolverine this morning streamed at 720P and stunning picture quality, colours are so vibrant.
Standard picture settings tweaked and very, very happy.
Regarding lip synch no problems with the set i have, using the TV tuner, Humax, Now TV box, all are ok.
Everything works, streaming music from the laptop, optical out, Super/ Pro upsampling DAC to the M/F A1 FBP , very good.