I've never heard of an HDMI cable intefering with your reception. I do share the same reasoning as you, I bought an HDMI cable years ago to minimize the cluster of cabling behind the entertainment center. In the future you may want to search elsewhere for an HDMI cable. I am sure you overpaid if you got a mnster cable. If you spend a little time on this site you will learn that there is more value out there, like this company. I have bought from them in the past and continue to do so. http://www.comprehensiveinc.com/store/p/14648-Standard-Series-HDMI-High-Speed-30-AWG-Cable-10ft.html
I am sure someone else on here can shed light on your interference issue.
Purchased a topfield 7150 pvr and decided to buy a monster hdmi cable off the internet to go with it, mainly to minimize the amount of extra cables I already had connected behind the tv.
After connecting it all up and searching for all the channels in the area, everything was going well, but when the search had finished, half the channels wouldn't display as there signal and strength was poor. However when i disconnected the hdmi cable and used the RGB cables along with the red and white audio cables, all the channels displayed fine with good signal and strength.
Has anyone ese experienced these problems with hdmi cables interfering with reception, or is it a pvr issue??