I received my Optoma h57 today and it's a great projector. Out of the box, the preset 'cinema' mode seems to deliver the best picture. I watched "Attack of the Clones" and was completely blown away, especially during the Coruscent speeder chase. Wow!
Gladiator was also very impressive, however, the dreaded rainbow effect is present - in fact it was quite bad to begin with, but slowly over the course of 2+ hours viewing I'm seeing less and less. AOTC was the last and I saw almost no rainbows.
Other than that, the contrast, black level, colours, are exceptional. I'm only projecting onto a white wall at present (the other walls and ceiling are painted black) and it's hard to imagine it being much better than this. As for noise, the PJ is almost silent. I'm sat about 18" away and could barely hear it. Over 2 feet will be silent. No distractions there. Screendoor is also a non-issue. From 10 feet at maximum zoom I see no SDE.
All in all, a damn fine projector. However, if you're prone to rainbows a demo might be in order. I see them but they don't concern me too much - other people may not be so lucky.