Hi Rick,
I have the Panny 4000 and love it, but I'm in a basement dedicated theater with total light control. One thing to keep in mind, and something that led me to the Panny instead of the Epson, is that I think the Epson only has manual focus and zoom whereas the Panny's is motorized and can be adjusted with the remote from your chair. Just some food for thought, but in the end the picture is the main thing, and I agree with everyone else that the Epson may do a little bit better in a room with some ambient light.
