Screen Suggestions Projector

Hello all

I am playing P3D.

I have been running a 6 monitor setup for a while now,

with a Titan Black card. The lower center monitor is a 34" curved.

Will be keeping the curved. But am going to add an overhead projector:

http://www.benq.us/product/projector/HT2150ST

I was wondering if anyone had suggestions regarding the screen?

Flat or curved? Dimensions ?

This is a short throw projector, designed for small spaces.

My room is 12 X 15 X 10 high.

Many thanks for your suggestions....

Mark