Hello, MattRod. We've got another thread on this topic (several, actually), so I merged your thread with one of the others that takes up the same discussion. You can read back through what others have said on the topic.
My opinion is that publication order is best: Lion, Caspian, Dawn Treader, Silver Chair, Horse, Magician, and Last Battle. This is as Lewis wrote them (almost - Horse was actually penned before Silver Chair, but Lewis reversed the publication order to keep the Caspian books together), and I think if you read them that way, you can see the stories and characters developing accordingly.
By the way, I haven't seen you post before. Welcome to the forum!