I have a 42" Samsung LCD, Hate it. It isn't old, it is a flat screen BUT it is 50hz, which means the picture quality is mediocre and changing between HDMI's is slow and un-responsive (Not to do with it being 50hz mind, just because it is a Samsung.)
In reality, it doesn't matter what brand it is so long as it has the following:-
*100hz (refresh rate = 100 times per second) - (Unsure what 600hz 'subfield' means on the play.com link?!.... this makes me wonder whether the real refresh rate is on;y 50hz as 600hz isn't available afaik)
*500,000-1 colour ratio (play.com link shows no colour ratio, not a good sign)
*1080p full HD - play.com link does have this
As for blu-ray - PS3 is the only option IMO, Hold their value better and are just as easy to work