Quicktip: And one last note. These two projectors as excellent as they are, especially for the price, are still, in my humble opinion (IMHO), not quite up to the level of performance that is achieved with DLP projectors featuring the DarkChip3. Some of these DC3 DLP's are now selling for under $4000. So, if your budget allows, do consider the difference. They will yield truly better black levels and get you one step closer to perfection.
Meantime, I have recommended the Panasonic to several of my friends right now, who are most pleased, and, I have since recommended a Z4 to still another friend, for different reasons, and I'm sure, he'll be just a happy.