I'm looking for an HDMI cable to go with my new Panny Plasma. Need around a 3M length to reach from my Verizon HD DVR to the Panny. Do I also need an HDMI cable to go from my Verizon box to my Onkyo receiver? In that case I would move the other cable to go from my Onkyo to my Panny. Sorry, but I'm new to HDMI cables. Thanks.