[ulnanVti]

Its the screen that will decide the viewing angle.
I hate the marketing going on with LED LCD's.

LED is just the replacement for the lighting source in the screen.
You have 2 variations:

1. Edgelit LED - 1 on 1 replacement of the light tube (same bleeding problem)
2. Fullbacklit LED - What is says. whole backside is filled with leds which can be turned off for better Black levels.

Either way, it wont make any difference on viewing angle. You will want a screen with a high Dot pitch, since thats a major contributor too a good viewing angle

Edit: as for placement: why not use an arm bolted to the wall?
This will also solve the view angle problem as you can tilt it.