I've looked at the specs and the manual for the Yamaha DSP-Z9 and Mr Yamaha has my attention! I actually want an amp that provides split L & R 'stereo' subwoofer pre-outs, and DPLIIx. The Yamaha provides them, well, what doesn't it provide? It looks like an absolute monster. So, now might be the time to upgrade. In the spec department it seems the Yamaha beats Denon hands down, but obviously specs aren't enough on their own. My amp is actually an upgraded Denon A1SE and I'm very happy with the sound quality. Has anyone heared both the flagship Denon & Yamaha and can give their opinion as to which has the sonic edge? Years ago I owned a Yamaha DSP2070, and my memory of it in comparison to my current Denon is not very favorable at all. But have Yamaha caught up in the sound quality stakes?