The VideoSecu MW380B5 wall mount can handle TVs between 37 and 70 inches, which is pretty flexible if you've got anything from an LED to an LCD, UHD, or Plasma model. It can safely support TVs weighing up to 125 lbs. The manufacturer also lists that it works with various VESA patterns up to 684x400mm, so it's likely to fit lots of TVs out there.
If you're particular about the viewing angle, this mount lets you extend the arm up to 14 inches from the wall. It's also got a tilt adjustment of +/-12 degrees and can swivel up to 160 degrees—plenty to get just the right view whether you're lounging on the couch or sneaking glances while cooking.
From our research, some folks mentioned that it feels a bit stiff during the first few uses. A little lubrication at the pivot points seems to make adjustments a lot easier though, so keep that in mind.
For installation, you'll want to hit those wall studs just right—it's meant for wood studs 16 inches apart, which is pretty typical. If your studs don't line up perfectly, you might need to come up with some creative ideas, like extra plates, to mount it securely.
Oh, and a heads-up: some people found the included lag bolts and screws to be not quite up to par for larger TVs, so you might consider upgrading those for extra peace of mind.
Overall, it seems like a solid mount as long as you set it up correctly. With a proper installation and a little bit of tweaking, it could work great for your TV setup.