Top projectors for classrooms

Looking at projector upgrades and I had a quick look on the web...there are so many! So here is my wish list:
I want to get something that:

1. Is so HD that when standing next to it you cannot see any dots.
2. Is so bright/clear that you do not need to close the blinds.
3. Is so cheap that I could get as many as could see us through till the next century.

Most of the new "cheaper" LED HD are not really HD and definitely not suitable for a classroom. I thought I would just ask the question of what folks are using in the classroom that make you say: "Damn that is a fine projector".

A lot of the better offerings seem to be home cinema but that doesn't mean they cannot be used in the classroom. After some research I was looking the Acer HD5360 which is 720p with reasonable price/spec. Anyone used this? Useful to have a top 10 projectors for the classroom based on actual usage and not suppliers recommendations.

Let me know your thoughts!

Thanks

Hitachi ED-A221-NM. On HDMI they are pretty bloody good.

They do still wash out in sunlight but a lot less than most other projectors as they are UST.

Casio Range - had over 40 of varying models (short throw, A130, A140, M130, M140) all brilliant

Casio XJ-M130/M140. Great projectors. We've had a load installed. Throw distances are great so they can replace many existing projectors with minimal fuss.

5 year edu warranty. I'd expect them to last longer than that... not had one long enough to find out though!!