Anyone know of any tweaks or suggestions on getting better cable tv reception. In terms of both picture quality and sound. I'm using regular analog tv set right now so no digital set yet. The picture as it is now on the TV is o.k. Each cable channel has its own color, brightness, sound, etc. It varies so much. Just wondering if it possible to improve cable TV reception or is it what you see is what you get. Filters? F connectors? ground? etc. Advice needed. Help.