Looking to get a couple fiber optic cables for the home setup. Question is, is there really a difference between a $7 cable on ebay and a $70 monster cable? From what I know about HDMI cables, there isn't much difference except in shielding and Cu content. Does this also apply to FO cables? Do different cales have that much more glass/plastic in them? I mean this isn't going in a $8,000+ audiophile system, but still a nice HT setup. should I spend $20 a cable or just get the cheap $10 ones?