I have a Panny 600u plasma that comes with a RGB PC input. I want to hook up my HTPC to it. My PC has an ATI 9600 pro card with DVI and RGB outputs. What should I buy? RGB to RGB cable or DVI to HDMI cable? I tried it with the RGB hookup and it looked fine, but I need to purchase a longer cable. Does anyone have experience with this? I am looking to mainly use it for PVR and DVD purposes.