Its been 3.5 years since the bulk of these posts, so I suppose an update is in order.
My home theater remains unchanged. I may start thinking about upgrading the projector as they just announced affordable 4k stuff at CEDIA this week. However, my life is changing. Kids are out of the house and I'm considering downsizing. A projector and dedicated theater might not be the answer.
I did do the upgrade of the family room system earlier this year. 4k 65" Samsung. Denon upper end ATMOS receiver. The big change was I upgraded my main speakers to Klipsch Heresay and moved the KG4s to surround duty. I also added 2 Klipsch bookshelves as height speakers, making a 7.2.1 system. The ATMOS is really nice and the height speakers make a surprising difference.