Suggestion is to read the 3 forum rooms of the PJ's you are thinking of getting, the last 3 or 4 months of posts, you want to see how people like the PJ and if any problems with PJ. Read amazon reviews good and bad on the 3 PJ's. Maybe also the pro reviews, like projectorreviews.com.
I mean look to see if people are happy with the PJ, are a number saying they had to return it a number of times. Iris problems, convergence problems, short bulb life, dust blobs, etc. It could be a good PJ, but if a number of people say they have the exact same problems, all you can say is as long as you don't get one of the problems, you are good to go. And if you do get one of those problems after warranty, you are screwed. All 3 are good PJ's.