Do take "manufacturer recommendations" and related source information with just a little skepticism. Technically, they know their stuff better than anybody, but there is a conflict of interest.
Since cables and length are such hotly debated items, I'd do some research through "common sense" lenses and don't discount what you actually hear.
Since cables and length are such hotly debated items, I'd do some research through "common sense" lenses and don't discount what you actually hear.