Thanks. I was 99% certain it was ok. Wanted to doublecheck.
Speaking a little bit about the ground loop issue. In my previous house, I had no ground loop problem. In my new house, I do have one. DirecTV was installed when I moved in, and I not only watched, but I helped the installer run the wires, ground it, etc. So it doesn't appear to be from DirecTV. However, it quite possibly be from the Cox cable (internet) installation that happened two days later. I don't remember a ground. (Don't feel like grounding it as the home theatre build will start next year anyway) I moved my sub to the corner about 10 feet away and along a different wall than the RG6 and I no longer have the ground loop issue. Also note that those 6 prong adapters into each outlet do not create an effective ground, I had to remove that as well. (not a surge protector with a 6' cord, the type that covers both outlets and has 2 rows of 3 outlets)
Has anyone seen any correlation between using copper vs. aluminum wiring and the ground loop issue? Just curious.