I share your concern about lamps and longevity. It is what keeps me from upgrading to a better projector.
So you do 8 to 14 hours a day, or 2950 lamp hours on the low side or 5110 on the high side. Getting a projector with a lamp that runs $300 could cost you $300 or more a year. My solution was to get a Epson HC2000 with $99 replacement lamps but you take a hit on contrast/black levels. Most media is fine but if you are a horror fan like we are dark images/scenes could be better, but it is a trade off. We have a $549 projector with a lamp rated to 5000 or 6000 hours, and a two year overnight warranty....but, the image isn't for everyone.
2D to 3D: some projectors convert 2D to a "3D" image.
Keep in mind your room will also impact the image. In a bright room the image will be washed out and any light lowers contrast. For example, my 169inch 16:9 image before I treated the room with 7 hundred watt lights on, 1 hundred watt lamp on and all lights off.
Last edited by steve1106; 09-16-2015 at 02:01 PM.