My brother has a Mits DLP and the bulb just went out after a year, he said a replacement bulb is $200 and easy to replace. He had bought the extended warranty so his first 2 bulbs are included, I have had a HD projection set from Panasonic for the last 2 years and have enjoyed it, pictures great and it has an HDMI imput so I am good for a few more years.
I researched TV's for awhile before I got the set and was going to get a DLP but they were out of my price range, now you can get one for what I paid for my projection. If I was to buy a TV now I would get one of the projection LCD's, same footprint as the DLP's and the picture looks great to me. I would stay away from DLP's cause of the bulb maintanence issue and plasma's because I talked to a TV repair guy who said that the plasma's dont last long.