Well I learned enough from reading this thread that I feel like I may as well post my results.
I purchased the HD20 refurbished from Woot! for the now standard $649
I purchased this 119" Screen for $119http://www.amazon.com/gp/product/B000JTDXOM
I used this mount from MonoPricehttp://www.monoprice.com/products/pr...seq=1&format=2
I used two of these wall plateshttp://www.monoprice.com/products/pr...seq=1&format=2
I used this HDMI cable to run through the wallshttp://www.monoprice.com/products/pr...seq=1&format=2
My projector wound up being a little over 14' from the screen which allowed more than enough adjustment to get the image to fit just about perfect.
To avoid the problem of my HDMI cable becoming disconnected in the wall behind my cover plates I put a zip-tie on each and then zip-tied those together like this
At this point I was too tired to bother with splicing into the home wiring in the ceiling for power (it is a rental after all) and instead ran an extension cord through a $5 channel from Home Depot
To compare my new screen to the 32" tv I was using is pretty amusing (excuse the piles of junk)
So this is what all of the above gave me
At this point, would I have done anything differently? Nope. For what probably totals $900 I have what I consider a movie theater in my living room.
Is it all perfectly color corrected yet? No, but it doesn't make it any less awesome.
Is it better than the 50" plasma screen I was thinking about buying? Without a doubt. I still use my TV during the day which just makes using the projector that much more special because I'm not constantly using it.
Have any questions or comments? I'm all ears. Thanks again for all the help!