I'm a newbie at this and need some advice/ recommendation on hooking up home theater system. I have an Onkyo HT-R580 system, a ps3, xbox360 and a directv sat box/dvr and a Panasonic GT-50. Do I hook everything to the a/v receiver or should I connect any componenets to the tv? And what about digital optical audio cable. Any help/recomm would be appreciated.