ps audio hdmi cables

It is easy to see the difference in HDMI cables, my wife can and she has no interest at all in technical matters. I say see because color differences should be less controversial than audio ones. For the money the Monoprice are very good, noticeably better than stock ones. I now use Wire World Silver on my HT and VDH on the bedroom set. Both of these are superior to the Monoprice but of course are much more expensive. Judging from my experience with cables in general I think the construction of the particular cable is more important than the material it is made of. I have a wide selection of cables, copper, silver and non metallic, and you cannot predict with certainty the sound quality from the material used. Bad or mediocre silver cables sound bright but some copper ones do as well.

PS Audio uses a different protocol from HDMI. This is why regular HDMI cables, though they fit, provide inferior sound.

I'm using Wireworld Ultraviolet 7.....1st class build, fabulous sound and video. Couldn't be happier. They are a great improvement from a HDMI cable set that was ranked second on the internet.

Can't speak for PS Audio, but my recent experience with Monoprice (quite nice, and very cheap), Wireworld Starlight 6 (similar to Ultraviolet 7, I think), and Apollo AV Lightning is that they do look different and sound different. The Apollo and the Wireworld are both better than the Monoprice. Visually the colors are more saturated and the edges of images smoother, less grainy. Not hugely better, perhaps, but noticeable to my wife and I. Note that I have a very high-rez audio system, and a top line late model panny plasma. I'm not sure these differences would be very apparent on a lower rez system.
Sonically: smoother, clearer, better focus.
Worth spending the $ for the level of improvement? Maybe not for many systems, but the Apollo AV are fairly cheap, and very cheap on closeout, and do give my system a bump in quality.