none of you guys own bedsheets you can 'try' with?
if you've got the projector, light up a wall, or whatever you can and see how it feels. personally i find there to be an issue with screen height, more than width. with the 120" i had, watching 2.35 movies was very enjoyable, but 16:9 stuff made me want to lean way back to try and take it all in. there's really no way to know how YOU will react until you try it.
i think a good question you ask would be when you go to the theatres, where do you try to sit? near the back, near the middle, near the front, don't care?
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC(Enby), PS3, XBOX360, Wii
Control: Harmony One