Just finished building a home cinema in my bedroom.
I did have my old 42" plasma in there, but it didn't really fit on wall properly and I wanted to move it to the conservatory anyway (so I can watch it in the hottub).
So, I had a widescreen projector anyway. I just bought a screen and mounted it.
Also, fitted a yamaha 5.1 speaker system I had spare - hid the wiring in the roof.
'wall rug' hides projector wiring as well as giving the room a bit of a focus.
screen is about 8 foot diagonal.
http://www.youtube.com/watch?v=9FJTtEEghFc
http://photosynth.net/userprofilepage.aspx?user=powerlord&vc=false
