Hi all,

I just bought Onkyo HT-S670 home theater system, have a few newbie questions will appreciate if someone can answer these:

For connecting DVD player receiver gives you choice of using optical or coaxial cable. Is one gives the better output as compared to other. On this message board I have seen a few posts where people preferring coaxial over optical is there any particular reason for that ?

Right now I'll be connecting only the DVD player, is it okay if I leave the video output of DVD player directly connected to TV via component cables or for some reason it has to go through the receiver. The receiver has only S-video as input and output.

Another question I have is about the quality of speaker wires. If I replace these with some 16 gauge cables would it improve the quality.

Last but not least how is the quality of products from acoustic research as compared to Monster cables ( which are considerably expensive).

Thanks!
--viveks