Let the hive mind of Engadget get that for you.
"What is the best wireless surround sound speaker solution? I have a home theater where running wires is just not feasible. I have my own speakers, so I don't want a system that has speakers with integrated wireless. I've done a far amount of research and have only come across a few companies that even offer a reasonable solution: KEF, Kenwood and Rocketfish. Is there anything else out there? What do you recommend? Thank you!"
Well, Absent One, the two people that replied to you are just plain wrong. There is no real certification for the testing on these cables, it's simply up to the manufacturer. If they test to a certain quality, most manufacturers can be trusted to meet that minimum quality.
That's minimum quality, tho. Your cable will not stop working when it sees higher bandwidth. That's just not how things work. The cables are not smart, they are simply a link from one end to another. HDMI cables generally do not pixelate, either. That's usually a switcher, or some other bad interface connection.
For the most part, if you buy decent cables (check Monoprice for their mid-level offerings), they will probably suit all of your needs.