Okay, I've educated myself more now and am looking for feedback.
My main restriction is the room itself which has a high ceiling and several windows, including two sky lights. My hope for ambient light viewing is to be able to watch late in the day, maybe 2 hours before dusk. Not much of an issue in the winter months where it gets dark near 5pm.
For a variety of reasons, I just don't see how I can get away from using a pull down screen. This basically means no ALR/CLR and the screen will not be very "flat". I've come to understand that Short and Ultra Short Throw projectors don't work well on pull down screens because they aren't flat enough. Also, because it's roll down, I wouldn't be able to use the ALR/CLR that seems to greatly benefit ST and UST. I also had to rule out the screens that roll UP from the floor.
Anyway, I think the way to go is to use a pull down 120" screen, probably white, unless I see a reason to go grey.
Right now I'm thinking... Elite Screens Manual Series, 120-INCH 16:9, Pull Down Manual Projector Screen, $300.
Of course, I want it all, but in this order.
1. At least a good or very good picture for viewing in a dark (after sundown) room with shades pulled. It will not be a pitch black room. In other words, whatever I compromise on, I still want to have a good picture at night as this will be 85% of the way I will use it for movies, tv, etc.
2. Ambient viewing. This one's hard to know without acutally seeing in person. Stats only say so much. Again, I'd like to be able to start watching an hour or two before dusk in the summer time. So maybe 2000 lumens at the least?
3. Gaming. I'd like to be able to game, not competive online FPS, but maybe more than casual. Not sure what input lag should be. Under 30 maybe?
4. Fan noise. I might just browse online using the projector without volume. I don't want to hear fan noise, so maybe 30db or less?
5. I'd like to do LED or laser. Traditional bulbs blow out faster and would probably be hotter and therefore noiser.
I mostly expect to just plug my laptop in and use the projector that way, so I'm not going out of my way to use android TV or other built in stuff.
Ideally, I'd like the projector to have decent audio. Nothing extraordinary, but like you might get from a quality flat screen TV. However, if the projector ends up being right in front of my sitting area, or above my head on a shelf, I may not be able to use the onboard audio so I might have use some kind of 3rd party sound bar. I'm not sure.
Wall to screen wall is 14.5', so if I'm sitting on the couch, maybe 13+' between my eyeballs and the screen. I could put the projector on some kind of table in front of me or I could mount it on a shelf on the wall opposite the screen. The high ceiling disqualifies a ceiling mount.
Budget just for the projector? Maybe around $1,500 but I could be talked into a little more to get the stats I want. I've searched a bit and seen projectors that fit my criteria. I can study stats and what's recommeded, but I just don't think I'll understand what matters until I see it. Likewise, I've read complaints about certain models or brands but I really don't know how seriously to take them. My plan is to buy 2 or 3 projectors and test them out before returning two. If it turns out, for example, that I just can't get a decent viewing with ambient lightly, I might just restart my hunt and aim for a projector that only needs to work in the dark. I have almost zero real life experience with projectors and will be buying online. US Market.