I'd recommend reading them in the original order -- I actually disagree with C.S. Lewis' chronological reordering.
The first 3 (Lion, Witch, and Wardrobe, Prince Caspian, and Dawn Treader) set up the world really well with consistent characters. Silver Chair continues that a bit, and then A Horse and His Boy tells a side-story. Magician's Nephew does more world building and is far more interesting to read as the 6th book since it fills in a bunch of holes and mysteries. Last Battle last obviously makes sense in both sequences.
I'd recommend reading them in the original order -- I actually disagree with C.S. Lewis' chronological reordering.
The first 3 (Lion, Witch, and Wardrobe, Prince Caspian, and Dawn Treader) set up the world really well with consistent characters. Silver Chair continues that a bit, and then A Horse and His Boy tells a side-story. Magician's Nephew does more world building and is far more interesting to read as the 6th book since it fills in a bunch of holes and mysteries. Last Battle last obviously makes sense in both sequences.
Thanks!