Considering purchasing a new HDMI cable for connecting my PIONEER PLASMA to the PIONEER 969. However there are varying reviews on whether such an investment is worthwhile giving that the existing HDMi cable that comes with the PLASMA is digital. Can you improve on a digital connection? Will I need to purchase 2 HDMI cables? one from the receiver to DVD and one from the receiver to the Plasma? Anyone using alternative HDMI cables and notice a big difference?