Veiwing distance.....

This site may help: www.myhometheatre.homestead.com/viewingdistancecalculator.html

At the risk of belabouring the point, I think the site I offered will provide "ideal" ratios. Ratios are ratios after all. I do agree that for most people (just not typical neurotic Audiogoners)the 1.5 to 2 X diagonal screen size to distance will work just fine. While Chadnliz have been using their speakers along the short wall, its been my experience that when using speakers parallel to the long wall, that the listening position is best when seated near the opposing wall. The problem then is with frequencies that have faster reflections off the back wall.This easily remedied with some simple room treatment. Its been my experience that bass response is actually superior in this configuration.