Question for guys who quickly upgraded from QS4 to QS8, looking back what is it about QS8 which really made it worth an upgrade from QS4? Its very of course very enticing for me to get the best there is (dreaded Upgradeitis), but the little of the common sense (QS4 is cheaper and smaller, so much less trouble from WAF) that's left is resisting it? Do you really get fuller sound from playing DVDs or CDs? Thinking about DVD-Audio, neither speaker would produce really good bass as mentioned above, so why not invest into better DVD player with good bass managment and let a sub handle bass load?