I like Ben Kingsley as the King on the Andrews recording, but the section of "Shall I Tell You What I Think Of You" starting with, "The Children, The Children, I'll not forget the children," has been cut, which is unforgivable.
The Murphy recording is worth it for her line reading of the letter scene alone. It's heartbreaking and frequently brings a tear to my eye. Her acting comes through on disc better than any other Anna, IMHO.
For a show that has so many recordings there really is no definitive recording.
There's a recording with Barbara Cook as Anna that has some nice singing from the leading lady, but is rather lifeless otherwise.
Marie: Don't be in such a hurry about that pretty little chippy in Frisco.
Tony: Eh, she's a no chip!