I mounted it. Worked great. used the following mount; VideoSecu LED LCD TV Wall Mount for 23 to 55 inch Televisions up to 88 lb VESA 400x400 mm with Full Motion Swivel Articulating Arm, 20 in Extension and Post-installation Leveling System, for Monitor Flat Panel Screen, Bonus 10 ft HDMI cable and Magnetic Bubble Leveler WP5
I've been suffering with mine since I bought it. Try to use the Amazon Instant Video app and it turns the TV off. Every time. If there is a way to get a firmware update, I have not been able to find it.
I had that same issue and it turned out to be the cable connecting my charter box to the tv so I replaced it with another HDMI cable and it turned the picture to perfection. Hope this helps, change your cables to new ones then reset to factory settings once you turn the tv back on.
Physically, the TV should fit fine, as its dimensions w/o stand are listed as 42.54"W x 24.86"H.
You'll need to make sure that the ports on the TV's backside are accessible (or that your setup accommodates what you're connecting to it).
Also keep in mind that putting the TV in an armoire will, of course, affect the sound from the TV's built-in speaker. Using any sort of external sound system should make this a non-issue.