It looks like I'm going with the Z4. The lens shift on the Z4 has sold me. I now have options I didn't have when I was leaning on the BenQ 7700. I read that the projector does a very poor job in interlacing 480i. I'm getting a Denon 1920 DVD player or an OPPO that upscales the image. I also have a directv HD Tivo that gives the option of 480i, 480p, 720p, 1080i. If I take the time to calibrate the projector, do I need an external video processor? I origionally was under the impression that since my Tivo can do 480p, I would be O.K. Can anyone reccomend some literature that can get me started with the calibration? This is my first projector and I know nothing about calibrating. I'm more of an audiofile than a videofile.