Over the weekend i decided to do a little test of my own b/c i was tired of the back and forth about whether or not high priced HDMI's are worth it over cheap 10 dollar versions. I used sum Wally world HDMI $10, and a Audiophiles cinnamon HDMI, which isn't really anything super special, $70. I tried my cheaper quality Samsung 60hz LCD TV and my bigger 240hz Samsung LCD with both cables for about 5 min. each, watching Planet Earth on bluray with fast moving to very slow moving scenes.
Let me say this first...THERE IS A DIFFERENCE. I had a friend watch with me just to make sure my eyes didn't deceive me. We started out with the Wally World one and ya it was a good picture don't get me wrong. But after looking at it hooked up with the Audiphiles HDMI we both immediately looked at eachother and said holy S*#t. The picture was so much crisper, cleaner, and more vivid, it seemed. We hooked up the cheap one again and it was like night and day to me. Everything seemed flat and dull. I am sold that it DOES matter which HDMI you have. If you don't believe me that's cool but try it for yourself and really study the details of the picture not just looking at the image as a whole.