Joined Arthurian Challenge

Becky is hosting this challenge and set it from April 2009 to March 2010. I've put myself in the category of one to three books as I prefer not to push it too hard at the beginning - I am not even set on the challenges I am going to participate in!
I decided that I would not re-read something, as for me the point of challenges is getting to know new books. Re-reading is okay for me only in challenges concerning authors' whole works (oh, need to think about that, maybe Oscar Wilde or Austen?) or series challenges (maybe a Harry Potter month?).
Hence I am not going to read any Marion Zimmer Bradley but on the contrary, I am looking for suggestions!

Here a few I am thinking about:

1. Thomas Malory, Le Morte D'Arthur: King Arthur and the Legends of the Round Table
Indeed, why not simply start with the essential work that I have not read yet?

2. Mary Stewart, The Crystal Cave (Merlin Trilogy Book 1)
#2 of the "Best Arthurian Fiction" list on Goodreads, suggested in the Arthurian Challenge itself.

3. T.H. White, The Once and Future King
#3 of the "Best Arthurian Fiction" list on Goodreads, suggested in the Arthurian Challenge itself.

Some other maybes:
Bernard Cornwell, The Winter King: A Novel of Arthur
Nancy Springer, I Am Mordred: A Tale from Camelot