Really depends on what you will use it for. But for sheer image quality for movies and television, my vote goes to the Panasonic P50X50 and the LG 50PA4500. Both are 50" plasmas. If you mostly do gaming or monitor-use, which is the only reason anyone should not get a plasma IMO, Samsung's UA46EH5000 and Sony's 40EX650 are good choices.
But seriously, for a little more the LG 50PM6900 is very hard to beat. There's also the 55PM6900. Saw it at 58K cash at Anson's Makati before Christmas.
A bit of OT:
@ mapl
I think I remember seeing you at TipidCP a while back. My handle there is Kestana.