I prefer rg59 coax terminated with a 75ohm connector. rg59 is more flexible than rg6 so it is easier to route. I like the idea that for longer sub runs coax cable can fend off interference from other sources (e.g. electrical lines). There are many internet sites to purchase this type of cable including Cables for Less, Cables to Go, and Blue Jean. If you are comfortable with your sub placement you can get a cable closer to the exact lenght you need from these sites. Enjoy!