Re: HDMI Baluns
hdmi matrix switching has come a long way even in the last year. As most of the manufacturers have realized that they simply need to put HDCP sink keys on the front end of their matrix and DA equipment as opposed to the repeater keys that they were originally trying to use. This does increase the chip licensing costs associated with the hardware but the problem with HDCP key limitations (cable boxes are especially bad about this) has essentially been resolved. Additionally manufacturers like Crestron and Extron have control based matrix and transport solutions that are more pricey but are worth the money if you have to have control of your displays.
If control is not needed then a simple HDCP compliant matrix or DA is not hard to come by. The key is to use HDCP compliant displays and ensure that your transport or balun system is also capable of passing HDCP and EDID information reliably. A common mistake that I have made is to use HDCP compliant switching systems and analog transport systems which renders the HDCP switching useless. Also, I have found that most of my installers perceived HDCP problems actually turn out to be improper EDID implementation.
As far as distance is concerned single category cable baluns that will reach 300ft but you must use the manufacturer recommended cables and connectors. Many of these cables are only category cable by spirit but have individual shields between the pairs as well as a foil shied and a drain wire. Not only are they a pain to terminate but usually require special crimpers and are generally more expensive.
Reading some of the "outside of the box" solutions above i can't help but have one of those "why didn't i think of that" moments but the old way of doing things is not dead, it just went into a coma for a while until the industry figured out how to get around the mafia driving HDMI and HDCP.
