If you don't know enough about what you are buying to KNOW if the cable's specs are good enough to work, then you deserve to be fleeced. If you are not willing to take back something because it didn't' work, you are asking to get fleeced... If you don't have time to fuss around, then just pay or installation and let the installer choose what you get (and will pay though the nose for).
I'm cheap. Personally, I use the "junk" HDMI cables at home and I get them for about $3 each when the local electronics retailer puts them on sale. Now I don't have ANY equipment that needs anything better than HDMI 1.1, but we've already established that for home use, I'm decidedly cheap. I work hard for my money and I'm not going to throw it away on something I can do cheaper.
Oh, and I've actually NEVER had a cable issue with any of the cheap HDMI cables I own. Like it or not, most of these things come off of the same few assembly lines in China now so for the same spec, one is as good as the next for the most part.