I'm pretty much done with the expensive cable garbage. For short runs, I use ultra-thin flexible HDMI cables exclusively. From either Parts Express or Monoprice. I hated the Monoprice ones at first because of their packaging a 1' cable in a big box. I know that's silly, but I carry 40+ cables with me for installations, so unboxing a ton of cables sucked and didn't make them appear 'new' when they were. Now they've gone to bagged packaging, so either one is great.
My tests of the cables have been on a $10,000 Fluke HDMI tester, and they have all passed 1920x1200@60Hz without issue, which is pretty much the upper limits of HDMI 1.4a cabling.
I do not have access to a 18Gb/s HDMI tester for HDMI 2.0 cabling, but would love to be able to do that at some point as well.
Under 6', if someone is still suckered in by expensive cabling, then I'm done trying to convince them or anyone. If they are my client, I let them know ahead of time if I can. I had a client recently get suckered in with both HDMI cables and pricey mounts from Best Buy. I asked if it was all still in the box, and they said it was. They returned everything and the amount of money they got back, paid for the mounts I installed, the HDMI cables I installed, and all my labor to install everything for them, and they got to eat out that night and have a few bucks left over.
Too easy today to find out that expensive cables aren't worth it.