I have a 885 on a 150" scope screen and frankly I would luke to have quite a bit more lumens. HDR is unwatchable and dark if run natively. However a lumagen box with tone mapping, and a professional cal by Chris Deering resulted in a pretty great image.
If you are going with something with a lumen output in the 885/995 range Id budget for a lumagen box to convert to sdr.
I also had a 665 on that same 150 inch screen. Liked that projector as well, but hdr was dark. One strategy could be to throw in a fresh bulb, get a lumagen, purchase your bigger screen and enjoy until the next batch of projectors from sony and jvc come along.
I do agree with the others though for a screen that large you would probably really need something with outputs around what the 5000 can do...
Sent from my SM-G965U using Tapatalk