The main TV should have had a good picture. If that was an issue, then by all means it should have been covered. (Pretty sure we're running HDMI cables now).
As for the other TV's, that's simply a result of all the changes in technology. We used to be able to take a signal and split it to 10 different TV's via coax. Quality was not very good, but with SD TV's it didn't matter. With high def our options are limited.
I have a call into King Controls because I would like to be able to future proof our systems a bit. I've asked them for some input. Otherwise we would have to run HDMI, RCA, Component & coax from the receiver to every TV location. We just have no idea what someone is going to install.
I'm a huge tech guy and run all my own home theater stuff. If we could get HDMI in cut to length cables that might be the answer to it all...but they are only preset lengths and some of the receivers only have ONE HDMI out. The other out is RCA for Standard definition.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).