Here is some more information:
Projector: I finalized my decision and bought the HD20
Seated 14' from the screen
basement- 95% of ambient light is controllable
lighter colored walls & carpet
main viewing source will be blurays or HD streaming
I probably care about picture clarity, color vibrance and good black color, in that order.
I realize it's a hard question to answer- I'm just wondering if maybe someone had experience with doing this kind of an upgrade themselves and what they might have learned from the situation.