I got the 70" wall mount when I bought the unit, at Costco, and it works fine (so far)--although hanging a monster like this on the wall isn't for the faint of heart (or limb--my arm is still sore!). The TV is around 100lbs, and the mount is rated to 125, although I have read advice about getting mounts at 3x anticipated load. (FWIW, the online price @ Costco was $200 more than the in-store price--"Free" shipping, my eye!)
Speaking of this purchase: I switched from a Sanyo Z3 projector to this and am thrilled. I can't remember the last time a "thing" gave me such delight! Our media room (until our basement is finished) is a ground-level family room with blackout curtains, and we now no longer need to blackout the room to enjoy most programming. We even had full sun coming into the room for a bit today (while watching the Rose Parade), and it was great!
Out of the box, the "auto" setting isn't bad; I calibrated the "standard" setting using a Spyder but wasn't thrilled with the results--only "color" and not even RGB?. After some tweaking, here's what I'm currently using:
OPC: ON (yes, I know...but you can restrict the OPC ranges and given that we have a ground-floor room with lots of light variance, it's a convenience and one that's easy enough to disengage)
Color: +5 (This is one setting where the Spyder gave me +22 or something really high, which really seemed off)
All the CMS hue, saturation, value settings are flat (0), but I haven't started to mess with them, yet. I'll probably just use the CNet settings as a baseline and tweak from there.
Color temp: LOW, all LO/HI gains flat / 0
All the other enhancements OFF--especially the "Active Contrast": hate it.
My setup is three sources: Tivo Series III, XBox360, and a Sony BR DVD player all going directly into the TV over HDMI with optical audio out to my Denon receiver to a calibrated 7.1 speaker setup. I have noticed no problems with audio synch. I haven't tested for full 7.1 surround pass-through, though. My receive can do HDMI switching if necessary, so I might rewire it accordingly--especially to reduce the cable clutter behind the TV.
Physically, the box from Costco fit in the back of my 2007 Sienna minivan, at an angle. I would recommend removing or collapsing down/out (not forward) all seats in the back of a minivan.
We now have a new family tradition: Someone says "Holeee COW!" and everyone else comes running to see the breathtaking image on the wall.
Gripe: Lack of dedicated IR codes so that my Harmony ONE remote can directly access AVMode and other functions. Does anyone know if this is even possible for Logitech?
Gripe: Horrible remote (clearly not an area they're giving much thought to).
My biggest gripe is that my wife likes film mode (SOE)! Why, oh WHY did I ever show it to her?!?! :< That being said, there have been a few moments, especially in animation, where it's worked well, but generally it just makes me feel like I'm watching a "making of" featurette and not a movie. I even sat through half of LOTR:Fellowship (on BR) and the movie just seemed silly with that on. Maybe she'll forget about it.
BUT, this was a great purchase--one of my best--especially to replace a five-year-old 720p DLP projector in a room subject to ambient light. Everyone in the family is thrilled, and the price was good.