I bought this one for my 427XD. It is really slim and really strong. You mount the bracket on the wall, some uprights to the back of the TV, then hang the TV on the brackets. Lots of holes to locate wall fixings.
This is also a really good price for this sort of bracket.
I mounted it on a studded wall and had no trouble locating solid wood spurs in the wall through the numerous drill holes. I then cut holes in the wall to pass all cables through. So TV seems to just hang in space on the wall with no leads hanging from it. Really neat job if I say so myself