Just wanted to chime in here as I've been running my GT60 for about 2 and half weeks now (Manufacture date of Nov 2012) and am super happy with it!
First I ran DNICE' slides for about 100 hours as he recommends, and then mixed in watching HD DirectTV (zoomed), Blu-Ray discs and slides for the 2nd 100 hours - Basically the TV has been on since I hooked it up.
I have to say that:
A) Picture is stunning - I had a rear proj 2008 Sony A3000 before this that died on me, and there is no comparison - Especially the blacks that just have limitless depth of inky goodness it seems!
B) No buzzing issues, even on the white slides. (Admittedly I can 'hear' when the white slide is on the screen only IF I stick my head behind the TV in a silent room and listen for it)
C) No IR at all- Just used my head and kept the brightness/contrast on the low side - Basically below 50 for the first week, and below 70 for the second. I watched most of the football games this past weekend using DNICE's custom settings (Post #3 I think on the HDJ site) with no IR issues even with the high contrast logos, score display etc.
So overall I just love this TV. I am going to continue to 'baby it' for a few more weeks to get some more hours under its belt but overall I couldn't be happier!
Thanks to all who have contributed to this ongoing thread which brought me up to speed on the in's and out's of this gorgeous tv! If anyone is thinking about pulling the trigger on a new one I say use your head as it breaks in, but otherwise GO FOR IT!