I think what I meant by not being at the limits of what I can resolve is more like Dolby's and DTS's lossy codecs were actually quite good, and there was little to more to gain going to the lossless format. It's going to take something quite special to get to the next big leap.

I like the idea of a height channel in the ProLogic IIz.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris