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Bill, thanks for the detailed review.

One major benefit of LED projection is that brightness remains relatively unchanged over the long haul. So, once you set up and calibrate the projector, that's it.

With lamp based projectors, how much dimmer is the bulb after 100 hours, 500 hours or 1000 hours? Brightness of a new lamp tends to drop significantly and then stabilize over time. So, how long will it take for a lamp based projector to be less bright than the LED projector? Also, as the lamp fades, colors and black detail will change, requiring recalibration.

It would be interesting to compare measurements after long term testing - after 100, 500 and 1000 hours.