Join Date: Mar 2005
Location: Portland Oregon
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Not going to happen.
23 feet is a long ways A 3LCD with proper zoom might be able to do this to at 135 but they will be lumen crippled at max zoom. I really doubt you will find a new PJ for under 550 that will do this.
Your pj has "2500 ANSI" lumens rating (this means it throws out a good amount of light), as a business PJ it can do that at the expense of other image aspects. Something with "800" just isn't going to do it. It is a bit more complicated due to specs, the real work, zoom and build dimming but it will you you a good idea of the sort of light that will be needed if you want this other screen to be anything like your screen.
There are some pretty bright business and 720p projectors out there. Maybe a3 lcd 720p form the last few years would have the light and and the needed throw for the setup but I don't think DLP has a chance.