I think I must have them in publication order -- the order he wrote them in.
TLTW&TW
Prince Caspian
The Voyage of the 'Dawntreader'
The Silver Chair
The Horse and His Boy
The Magician's Nephew
The Last Battle
My set was by Collier Books, printed in 1970 as far as I can tell, though that would have been a little bit early for me
I can see that TMN is the book set the earliest within the series -- and for some series, I think internal chronological order is important -- but that one just doesn't seem a good introduction.
Never saw TLTW&TW on BBC
but I was in London 10-12 years ago, and there was a children's theater doing a live version
And before we went home, they switched over to another one... don't recall which one... so we got to see that, too. It was fun <g> Plus, even though we had seats in the back, we had a great view, 'cause most of the other patrons were under 4ft tall
PJ