The dell is probably too bright for darkened theater home use.

http://www.projectorcentral.com/Dell-S718QL-Advanced-Laser-Projector.htm

Here is the optoma compared to the highly regarded JVC 440. Pretty much a toss up. The JVC is slightly cheaper with slightly better blacks. The Optoma has better contrast and laser life. If I had the funds and was buying right now it would be a close one for me. Laser is a very exciting technology. The fade and shift of color in lamps makes laser a far better choice for installs where the user isnt supposed to have to tweak anything to keep peak performance. There was mention on the review rainbows were very minor with content known to create severe rainbow effect on other models.

http://www.projectorcentral.com/JVC-RS440U-vs-Optoma-UHZ65.htm