Which Projector?

Ive got an install coming up requiring a projector and electric screen. I havent done much work with projectors.
Its going in a cabaret venue that holds a lot of works dinners and they are fed up with hiring them in and want something permanent.
What make are best to go for / avoid. Gonna be ceiling mounted if that makes any difference.

Cheers
Chris

+1 for what Preacher said.
But for experience of projectors, I used to work in a school as a technician and installed many projectors in classrooms and 1 in the school theatre. That was a NEC4001 (IIRC), the difference in brightness compared to the classroom ones (Benq's and HP's) is outstanding, but then again it was £299 per classroom and about £2500 for the NEC + £1000 for the lens! And they weigh a fair bit too! (Says the muggins who carried it up the scaffold tower and hung it from it's bracket). Also don't try and let them skimp on a decent screen, either front or rear whichever one they use, as that makes a huge difference.
Also, several prospective suppliers brought several projectors into the school to see what we liked best. That might be because it was a school and therefore a good 'in' into the council, but ask, they can only say no. (In which case tell them to get lost and you'll take your money and trade to someone who will and in this economic climate I'd imagine most would bend over backwards). Hope that helps.