I find it interesting that one of the links posted above with the specifications for the HX300G states 20.000 hours estimated life time for the LEDs and the other link states 30.000 hours of use, and that estimate is printed twice in the spec sheet...
Now that it has been confirmed that the HX300G can be used with screens up to 100" diagonal, just as i imagined, i can proceed with my plans to select a larger screen than the 76" diagonal that i am currently using, and it's going to be a high-gain screen again as i became enamored of that image "pop" that these screens provide, even at the cost of an elevated black level.
BTW, insofar as rainbows and the HS-201 are concerned, i now realize that i can see them often times, but that depends a lot on the onscreen image - especially during low contrast scenes that have vertical/diagonal bright lines - but i also noticed something else that i never seen mentioned before : sometimes i use contact lenses and sometimes eyeglasses when watching TV and i definitely can see a lot more rainbows when i have my eyeglasses on, and very/very few rainbows while wearing contact lenses !
I imagine that has to do with that extra "layer" of optical material located approximately 1 inch in front of the eyes (the eyeglasses) and some unexpected visual interaction, versus contact lenses, which sit right on the eyes ?
I wonder if TI ever studied interaction differences between the use of DMD chips with viewers that use eyeglasses versus contact lenses, as well as viewers that do not use either ?