Sharp doesn't sell much in the way of commodity panels right now anyway. And they are apparently trying to get out of the mid-range panel business to focus on the 60/70 business.
There is no difference in HDMI cables. If you can see the picture without visible dropouts or sparklies, the cable is working at 100%. No other cable will display a better version of that picture. You're simply wrong if you think there is a better digital cable than one that is already working.