HDMI cables and speaker cables are not doing the same thing, with speaker wiring you have to worry about current flow meaning a thicker guage is required. For HDMI cables there is very little current so wire gauge isn't as important.

I would follow Steve's advice and buy your HDMI cables from monoprice as their wires have been proven to be very efficient with HDMI, for way less money.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70