Telly. The BIG question.

OK team.
Big TV purchase time.
40 inch(ish) screen. Will most likely go on a unit in the corner, taking advantage of the viewing angle 45 degrees to room.
I’ve kinda made my mind up it’s to be a Sony or a Panasonic. Simply based on the very satisfactory results I’ve had with other products from these two. This by no means indicates that their tellies are any good…what do you think?
Nowthen, LCD or Plasma?
Pittfalls and prattfalls to be listed please.
Tanks in advance.