I put a 32" Vizio in mine because I had it, and honestly its the biggest I would go...its possibly a tad too big.
I ordered two mounts to decide because in my 324BHTS you walk past the TV to get to one side of the bed, so I didn't want it sticking out.
I went with this one:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
It puts the TV nice and close to the wall, but the base is a bit bigger than really needed, but also allowed me to put 3 3/4" lag screws, I think 5/16" to hold it, and its solid as a rock.
I do find the quick release to be handy, but right now, the TV can slide left to right in transit, so I pop it off and set it on the bed. You would need to put two small screws in the track where you want it to keep it from sliding, unlike the smaller compact mount you showed, but it stuck out from the wall more than I wanted.
I did do as other mentioned and used a stud finder to find the plywood plate first.