I always knew this was part of conventional wisdom, but I’m glad Digital Foundry did an empirical analysis on whether “higher quality” HDMI cables made a difference.
Unless your dog needs more adventures (read the customer reviews), you don’t need to spring for a pricier cable.
On the face of it, the conclusion is that you can run any HDMI cable – no matter how cheap – and get identical results. However, very poor quality cabling can present image problems in certain circumstances, and the accepted wisdom that with digital you either get an image or you don’t isn’t exactly true. A low quality, very long HDMI cable could work fine at 720p for example, but could introduce digital artifacts at 1080p.
Read: Digital Foundry vs. HDMI video – Page 1 | DigitalFoundry | Eurogamer.net.