Help deciding on projector

My viewing room is 12x12 and I have a 92" screen.

Looks great, would love to make it 100" but it won't work with the current configuration in the room.

Take a look at this for basic viewing information: http://myhometheater.homestead.com/viewingdistancecalculator.html

I am assuming your 80" screen is a 16x9 diagonal - so your seating is reasonable for the size of the image. If when you're seated the eye is further back, you may be spot on for THX distance. There are other issues such as projector setup parameters, light control, etc... but I'll guess that you've already thought about these issues having been reading the forum for years. Do you have specific concerns?

I am setting up a temporary theater in a 10x11 room using a a 96" 2.35:1 screen (basically a 77" 16x9) - I always play the bigger is better game when it comes to displays.

As to the size of the screen, you might consider a step-wise approach. Select and purchase the projector first, install it, and project the image onto the screen wall. You can then zoom the image to various sizes for final selection in your room. This is what I will be doing in my room to understand my entire range of screen size options and where the screen would rest on the wall.

I think the "Screens" forum would be best to pursue recomendations. I've owned both Stewart and Carada screens - thought they were both great for my application. You'll need to understand your application parameters (is the room fully light controlled, will you use it exclusively for theater, or with lights on too for television/gaming, color of room walls and carpet, frame style, etc.) as these can all affect your final choice(s).