The room is not perfectly light controlled (one window with blinds). I have only 12ft from the back wall to the screen. To get the screen size i want (92-96inches wide) I would have to be at max zoom on the z3 and ae700 and close to the max zoom on the hs51. the ae700 has a far longer zoom so i am wondering if it will have more issues/degradation/focus problems at max zoom than the z3. from what i have read the hs51 seems like it might be too dim but otherwise it would be a top choice. the z3 seems the most reliable but the blacks are not as good as the ae700. my concern with the ae700 is the reliability of the auto iris, i have read problems with it failing, so i wonder about the longevity of the projector (also i have read bulb dimming anecdotes, it seems brighter than the z3 new, but maybe it does not stay that way). which projector do you think will work best within my limitations?