I'm most pleased with the LG filling all of my 128" Firehawk G3. I can say, that although I favor projectors with still better black levels, the pairing of the LG with my Firehawk works really well. On the other hand, when doing some of my photo shoot, filling about 100 inches of my 106" diagonal Carada Brilliant white in the testing room, the image was exceptionally bright - which some might find too bright. My own objection was not to the brightness, but how bright the blacks were on the smaller screen which happens to be a 1.4 gain screen. With all those lumens, on the smaller screen, the "blacks" were more of a medium dark gray. On my Firehawk, at the larger size, the blacks are a very dark gray, dark enough that I can live with them, and I'm pretty picky. (That doesn't mean I'd save the thousands of dollars by buying an LG instead of my JVC RS20, had the choice been there last year. I wouldn't.)
Bottom line - unless you are going with an exceptionally large screen (at least as large as my Firehawk, probably), you'll be best served with a high contrast gray, like the expensive Firehawk, or any number of less expensive HC gray screens including the Elite HC gray (light gray - a "compromise surface), or the Da-lite HC Da-Mat, to name two. Or even the Da-lite HC Cinemavision, which is a light gray HD screen like the Elite (the HC Da-mat is a darker gray with lower gain).