I got this for my 60 inch. It’s SOLID! You can pull the tv all the way out and it won’t bow at all.
VideoSecu MW380B3 Full Motion Articulating TV Wall Mount Bracket for most 37"-70" LED LCD Plasma HDTV up to 165 lbs with VESA 684x400 600x400 400x400 200x200mm, Dual Arm pulls out up to 16" AW8 https://www.amazon.com/dp/B001LL5JDA/ref=cm_sw_r_cp_api_h1YjAb15EHN0Z
I'm a value for money guy. I got this one for my mount in my living room for a 55" samsung tv. I use the arms to watch my TV at more than 2 feet away from the wall. It's pretty awesome. I can't say I have any issues with it.
I did install 2 2x4s on the wall against the studs first though to make sure it's completely safe.
https://smile.amazon.com/gp/product/B001LL5JDA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
https://smile.amazon.com/gp/product/B001LL5JDA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I use this mount now and it extends out pretty far. To make it safe, I first screwed in horizontal 2x4 across the studs and then mounted this on the 2x4s.
What about an articulating wall mount? Something off the wall so windows aren't directly obscured, that can move around a bit in case you do need 100% direct window access.
Something like this:
http://www.amazon.com/VideoSecu-MW380B2-Motion-Articulating-Bracket/dp/B001LL5JDA
Just make sure it's meant to hold the weight, and your wall and handle it.
I used this for an extremely heavy 48" Panny Plasma: http://www.amazon.com/VideoSecu-MW380B2-Motion-Articulating-Bracket/dp/B001LL5JDA/ref=sr_1_5?ie=UTF8&qid=1461271902&sr=8-5&keywords=videosecu+tv+mount
I found the build quality significantly better than the SANUS products I looked at. At full extension I get maybe .5 in of flex
Probably a Sanus swivel mount or Rocketfish swivel mount from Best Buy if you want a brick and mortar option. Videosecu makes a cheaper one but it only swivels 80° in either direction and one of the reviewers on Amazon said he used different lag bolts than the ones included with the mount but was overall very happy with it. I'd read some of the reviews because they highlight a few of the issues but the ones I read seemed minor for the price of the mount and Videosecu is a well recommended speaker mount company but it's not a Sanus.
Looks to be a video secure found on Amazon.
Every TV in my house is mounted using this same one. 48” LCD, 55” & 77” OLEDs. Highly recommended.
I used this VideoSecu MW380B2 Full Motion Articulating Dual Arms TV Wall Mount Bracket for 37-70 Inch LED, LCD and Plasma HDTV A37 on a couple of 50" & a 70". Works great.
I've got the one listed and love it. Pretty easy to move around and rock solid.
https://www.amazon.com/gp/product/B001LL5JDA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Couldnt you just get an articulating wall mount to squeeze the TV through. http://www.amazon.com/VideoSecu-Articulating-684x400-Leveling-Adjustments/dp/B001LL5JDA