To be completely accurate, I ordered a Z1 but haven't got my grubby little hands on it yet (hopefully tomorrow!)... however, I do have some questions for all you experienced Z1 owners out there. How much of a gain in DVD playback PQ can I expect going from an Xbox (un-modded so non-progressive scan) to a cheap progressive scan DVD player (say a CyberHome CH-DVD 300)? Is it subtle or in-your-face impressive? Also, how is the line doubler in the Z1 for non-progressive sources such as analog/digital (non-HD) cable? Tivo (stand-alone or DirecTivo)? Most of the posts I have read pretty much just talk about DVD or HD playback. Thanks for all your help!