Originally Posted by Willie
Viewing distance is definitely a preference deal. I am watching 128" 16X9 diagonal at 10-11' depending on where the seating ends up after vacuuming. Many would say that is too close. I like it. YMMV.
to add to this, I used to have 120" and dropped to 100"(I think 108-110 would have been ideal but room compromises) at 15ft+ viewing distance because I found it tiring to watch 16:9 content on the larger screen. guides can tell you at what distance you're likely to see screen texture, or pixel structure, but only personal experience can tell you what size field of view you like. if you like your peripheral vision being engaged or not
where do you like to sit in the movie theatre? i'm definitely a back 3-4 rows kinda guy myself. I like to be able to see the whole screen without moving my eyes around
oh, and i'd say have them run some extra length to both the power and hdmi. relocating the plugs and patching the holes really isn't THAT huge of a job, IF you've already got the cabling run 90% of the way there. it's unlikely you'd have to move it, but it's nice to know it's at least an option, just in case. I've moved my projector location 3 times already, but sometimes I think I enjoy the build more than movies...