Do you already have this projector? If so, stick up a sheet in your window and have a look at it. My guess is that it'll look just fine and the ToTs won't really care.
http://www.amazon.com/gp/aw/d/B00TF...+projector&dpPl=1&dpID=41iC7-Uq0UL&ref=plSrchI think Icepick's projection looks pretty good. Thanks for sharing that pic Icepick! What projector is this? I am new to this arena as well and enjoy seeing what other forum members are using.
I guess another thing to think about when selecting your projector is if you plan on using it for other than Halloween events. I ended up with the epson 730hd as my main use will be for outdoor movies and I wanted a better resolution, but didn't have the extra $$$ to spend for a full 1080p and higher lumens/contrast.
I know that Atmosfx suggested 1800+ lumens and a contrast of at least 12000:1, so that was one of the factors I looked at as well as having an HDMI and USB. I wouldn't think a lower native resolution would look that bad. If I were using my projector a few times during the year, I would have gone with lower specs.
Good luck as I know there are many of factors in picking the right projector.
Thanks Icepick. Your whole house mapping videos are incredible!! Great job!http://www.amazon.com/gp/aw/d/B00TF...+projector&dpPl=1&dpID=41iC7-Uq0UL&ref=plSrch
This is the projector that the above picture is from. My main projector that I use on my whole house is a benq Mx880ust