[dhs12345]

Another issue with the DLP -- the bulb. Mine, a Samsung, is customer serviceable. The bulb is estimated to have around three years of life and will have to be replaced.

[bmwcyle]

DLP is the way to go. It mounts on the wall if you can still get one of these.

[-YYZ-]

DLPs (and LCD/LCOS, etc, projectors) do have moving parts, as well. For DLP there is the spinning colour wheel, and all the bulb-type projectors have cooling fans, too. Many plasmas and LCDs also have cooling fans, which can be a source of unwanted noise.