Also ask yourself -> 20k hour bulb or not, how long will you really keep your projector ???
Other than the top-of-the-food-chain CRT crowd ( G90s ,Barco, etc ) of a decade ago, who keeps their PJ for more than a few years ?
The LAST thing I worry about is bulb life.
I've been a JVC-guy for a decade and after 250-300 hours I buy a new lamp anyway, or buy the newest model JVC projector.
Really, what's $400 +/- for a new lamp to maintain peak brightness/contrast ?
My latest HT room rethinking had me strongly leaning towards a Constant Area setup with 4-way masking.
Screen ratio W:H of 2:1 -> and I ideally wanted 132" x 66"
This would give me 132" x 66" for 2.35 content, and 117" x 66" for 16:9 content
I canned that idea as I only have an 8.5' ceiling and going 66" high screen compromised my speaker placement too much ( non AT screen ).
So I just ordered a 136.5" x 56" scope HiPower screen.
I was drawn to that size as from my seating it doesn't look like just a "big sized screen", it looks like a "WOW sized screen"
120" wide would probably have been ideal per "the numbers", but lacked that Wow-size-factor that the 136" wide gives
As I am currently screen-less until the above arrives, I was surprised my JVC RS65 could easily light up that wide on my painted beige wall.
I'm not going to be one of those that says the JVC is as good as the Sony 1000.
But if you don't need the added lumens of the Sony to light up a monster screen, slumming it with an RS66 is worth a consideration
This opens up budget to toss some loot at something like a slick automated Schneider or Isco anamorphic-lens, or other goodies.
There is another thread talking about a spec for anamorphically encoded Blu-Ray