I received my 65" GT50 8 days ago, which replaces a 5-year-old Mits DLP RPTV. (Poor Mits died on me.) Purchased from Best Buy, who price-matched with amazon.com. I opted for the free delivery choice, but they still unboxed it, installed the stand, set it on my old Mitsubishi 65" stand and connected one source to make sure it worked. (They also hauled away the Mits for free.) I've spent most of the last week reading this thread and others, and fine-tuning the picture -- which is fantastic! For my 1080P HTPC (ATI Radeon card HDMI) input, I've settled on the CNet settings; for my Dish HD receiver, I'm using the THX cinema profile; both with contrast and color saturation dialed down to my taste. I prefer a natural look.
Like others, I was somewhat concerned about the negatives being discussed about this model; but to be fair, all brands and models have just as many negatives. Being forewarned, I was almost afraid I would see or hear things that maybe otherwise I wouldn't have even noticed.
Very glad to report, though, that not one of those problems seem to be present in my set. No buzzing, no IR, no burnin... The PQ is amazing. I ran the slides overnight a couple of times, but then just let the MediaBrowser screensaver run all night, which rotates fullscreen backdrops from all the media on my server. The rest of the time I've just varied my viewing in the same way I always have. Just got around to occasional letterboxed bluray movies the last couple of days. I guess I have an advantage in that I was used to being careful about burnin with the RPTV, so didn't have to form any new habits.
Even though my living room has multiple windows which I could darken with their solid blinds and light-blocking drapes if I wanted to -- I haven't yet felt the need. Sure, there is some reflection on the TV -- but the GT50 seems to deal with it better than the matte screen of my old Mits did! Really don't understand how, but won't question it.
Being retired, my viewing is pretty evenly divided between day and night, so I'm relieved daytime viewing isn't a problem.
All in all -- very very happy with the GT50 at this point, and hope it stays that way.