HDMI can be a real finicky thing. Cheap cables at small lengths may work fine. However, as you start getting into higher bandwidth applications, HD audio, etc. cheap cable can cause real problems.
Problem is the the HDMI organization sets the specs and licenses products but will not evaluate the performance of any. So its buyer beware. Most people think that just because it says HDMI on it well it has to work. This is the case not just for cables but everything HDMI. so just because a device has an HDMI port, does not guarantee that it will function properly in your setup. A simple point in fact was with certain cable boxes and having a HDMI capable receiver in between the cable box and the TV. The signal would not pass through to the display.
I do home theater installations. There is one independent organization called DPL Labs, that certifies cables from any manufacturers that want their products evaluated. Trust me not all HDMI cables, connectors and devices are equal. DPL Labs is well known in the custom installation world and are pretty much an authority on the subject. They have proactively taken the approach of establishing standards a cable or device must pass in order to be guaranteed to work.
I only use certified cables, in the appropriate certified lengths to avoid any issues and rule out cabling as the source of problems. Just because one shorter length of cable passes the rigorous tests does not mean that a longer one would pass. Many cases they wont. I also think Monster is overpriced and over rated. As a matter of fact I do not even see their cables on DPL Labs site.
DPL Labs Approved Products
I am not saying that other manufacturers cables, not on this list, won't work. But in my line of work I am looking for certainty and lowest chance for call backs, problems or troubleshooting.
Not to mention there are various HMDI versions. A cable that may work for 1.2 or 1.3 may not work for higher bandwidth requirements needed under 1.4 devices. There are also ethernet capable cables, to allow networking over the HMDI connection to a device and non-ethernet versions.