if you're patient you may look long term to a front projector system...they're coming down in price so if the bulb replacements also come down in price then this would be the best way to go because you could actually put all 5+ speakers at the same height and be the exact same speaker -- IMO it's the best way to go...plus in general I find the front projectors to be the best picture and can be the biggest picture and don;t seem to require the dark rooms of old. Also adds the theater experience feeling to the whole thing. But the bulbs are around 2000 hours and cost hundreds to replace.

You can always run your set-up in phantom mode --- much of the time I have heard this beat the system with the side-leaning center speakers...not all the time but worth a shot.