HDMI vs. Component Cable

I currently use AudioQuest component cable for my video. All cables used are AudioQuest, the problem is how do I benefit and compare the two types. My system is a BK507 AVR, Denon3910 DVD, Mission Electronics V6 series Surround Sound, Velodyne DD10 Sub and Monster Power HTS3000. All cables used as stated are AQ highend AQ. My dilema deciding to change my component from my AVR to my HDTV and go with an HMDI. What about from my HD Tuner what cable do I use there? I'm confused?

AL