What size do you want? Anything smaller than 50" 1080p native is a waste on, unless you sit like 1 metre from the tv. The Contrast/Colour/Picture is much more important.
If you want 42" get a plasma, 1080p isn't needed but up to you.
If you want <42" Gotta be an LCD, 1080p is a bit of a waste.
If you want > 42" Then Plasma 1080p...
Panasonic make a decent plasma for a reasonable price.... about 1300 for the 42" 720p one or about 2200 for the 42" 1080p one...
Inbuilt HD tuner or external, up to you, a lot of them come with it in now... One less box and cables to worry about.
As for BluRay, your PS3 will do it, so up to you if you want another separate player.
Everyone will have different opinions, check dtvforum.info if you want to read more.