business projector versus a home theater projector? Is there that much of a difference in black levels?

I am budgeting about 500-600 for the project and about 100 for the screen. I can afford a 2000 projector.
A ViewSonic PJ506D SVGA (800×600) 4:3/16:9 2000 lumens business projector is going for 500 with a mail free screen and mount offer.
An InFocus In72 WVGA (852×480) 900 lumens home theater projector is going for about [...]

Mitsubishi HC1600 720p DLP Home Theater Projector

From the Manufacturer
If you are a high-definition video enthusiast who’s looking for a more affordable way to bring a front-screen projection to your home theater surround sound or family room, the Mitsubishi HC1600 projector is the right choice for you.This native 720P high definition projector shines bright at 1700 ANSI lumens and includes a sharp 2500:1 [...]