Mits HC3000U 3,500.00 plus tax Canadian. sharpest picture, bright high def picture, a little touchy to set up, but if you look, you'll see the best picture under 4,000.00 IF ?? you like Sharp high def digital look. Panny ae900U is nice with a smoother softer look, very bright natural colors. I like the digital high def look, so make sure you put this one on your list to look at. Sanyo V4 Nice too. Thats the top 3, in my opinion.
Optima has a 1080p HD81 .. 10,000.00 US , but will come down $ soon. and that unit will leave your jaw on the floor, going out looking for a second job, or a second mortgage. Thats the one I am waiting for...18mos it'll be 5-6k.
He's asking for the best DLP projector up to $4,000, he said nothing about screen, cables or electronics. He can do better than the Pan. 900(which is a LCD) by the way.
Screen, mounting (which I did not mention), and cables, add considerable cost to a projection system and deserve consideration. Will spending twice the money get twice the viewing quality? Why eliminate LCD? I have had an LCD for almost two years and am very pleased.
As mentioned, have you considered the cables, screen, and other options that will add cost to your figure? Let us know as our suggestions may change.
I've just upgraded from an Infocus 4805 to the Samsung 710. I'm using a 92" screen and I sit about 11.5' away from it. I am very happy with the purchase, the colors are very good, it has a decent contrast ratio, and it is very good with dark scene details. I never understood what people have meant when they said "film-like" picture, until now. HD from OTA is amazing.
I think an improtant question is, "What features are you looking for"? At that price point you have a lot of choices of good projectors. One feature I like that gets overlooked is powered zoom. YOu can get it starting at about $3000. If you have at least 1.33X zoom you can go from 1.77:1 to 2.35:1 right on your remote. That is a really cool way to eliminate letterboxing.
Also don't get sucked in to the spec wars on contrast ratios. After a certain point you can't tell the difference.