I'm planning to buy either the Onkyo HT-S660 (5.1) or HT-S760 (6.1) home theater packages. I think I'll be satisfied with 5.1, but the HT-S760 has inputs for component video while the HT-S660 only has S-Video inputs. I have a HDTV monitor, HD cable box and progressive scan DVD player thus component video inputs are important to me.
I have a few questions though:
1) What is the actual purpose of running video cables into the receiver then to the TV? Is it more of a convenience thing or does the receiver actually do something to video?
2) Is there such a big difference between 5.1 and 6.1? Will I regret not going 6.1 in the future?