Room: 16 x 18.5 how big of tv?

10-11 ft will never be too big for 90 inches and below with any HD signal, DLP Projectors can give some showing of pixels as you get cclose but even then the distance of 10 or so feet is a non issue.
Get as big as you can and you might be shocked to find how cheap Projectors are if you can control light and dont need to cycle it on and off many times per day................there is nothing like a great flic or even a concert DVD on a nice big screen.sports too!

It isn't perfect or followed by any particular guidelines but here it goes:
I have two displays in my listening room.
* 50" 720p Pioneer plasma
* and 1080p Optoma DLP projector and 84" motorized/tensioned screen

Viewing distance is 12' to plasma display and 11' to motorized projection screen.

Pioneer is great on SD as well as HDTV and looks better then my newer 47" LCD 1080p display but nothing in comparison to "big screen experience".

Depends on your seating distance. I wouldn't go below 100" diagonal for an 11' viewing distance or 110" for 12'.

Seating at 1.5 x screen width for a 16:9 screen is an OK compromise which doesn't make lower quality sources too big or good scope DVDs too small

A Big Screen experience really requires a big screen. it's really the icing on the cake. the word Theater kind of says it all, doesn't it?

I've not been to a theater that used minimum sized screens. I had a 61 inch in my 14x20 room before this larger combo of 720p DLP PJ & DIY screen. there is no comparison. I've asked people who have pretty good eyes to be as critical as possible and tell me where and/or how it is less than great or if there are any distracting artifacts being displayed... no one has seen any screen door effet, pixels, rainbows, etc. The only knnock, if you will, is this display does not have the sheer intensity of a regular CRT TV. Several have said this image is better overall than their large 36 - 46 LCD screens as there isn't any ghosting of rapidly moving images as is more common on LCD TVs.

All of these notes have been given without me telling them I've got the PJ set to it's low output setting to extend bulb life either.

Bulbs cost a lot. $400 each. Very true. I don't know how long or how much life I'm going to get out of mine in fact on it's lower output setting, but it is projected to be around 4-5000 hours by the BenQ team. But say it is only 3000.

3000 hours equates to more than 8 hours a day for one full year... at a cost of 13 cents per hour.

If it’s not used as a primary TV source a bulb purchase comes even further down the road for you. I use mine on avg thus far about 8-10 hrs per week. On paper I should buy a bulb in just under four years.

So for at or under $1,000.00 entry fee, I’m quite pleased of course… so were those who’ve watched it.

Jim I did mine for $800 (720P Panasonic LCD) and a 90 inch $100 manaul pull down......for what it is and its use its pretty awesome. I still am surprised how few take advantage of Projectors.