THE AFRICAN QUEEN is only available in region 2. The U.K. disc has a commentary by dp Jack Cardiff, but the image quality is not everything it should be. It is worth owning and quite enjoyable if you're region-free.
NOTORIOUS was issued first by Anchor Bay in an excellent transfer and later by Criterion is a better than excellent transfer with mucho supplements. Both are out of print but still obtainable from ebay and Amazon sellers. Buy the Criterion if you can. It is Hitchcock's best film, one of Criterion's best DVDs, and worth every penny.