No, you're not being pedantic; of course you are correct, he is not their uncle. I knew that of course, but after not having read the series for so long, then starting again, I suppose I introduced that element in myself. I'll fix the post.
I can see why you wouldn't like The Magician's Nephew. Indeed, spoiling the mystery in stories often detracts from their charm. But for me, it was surprisingly fun. I honestly liked a lot of it, except perhaps the lamp post. I agree, there was no need for an explanation, and I didn't like that particular explanation anyhow.
I too agree the TLTWATW was a much stronger start. It probably is my personal favorite. I'm not a fan of the renumbering either, and I'm glad I read them in the original order. It's kind of like watching Star Wars from Episodes I-VI, when clearly the better order was the release order (if you have to watch the PT at all--gotta remember where I am ;) ).
They're not hard books to read, but my reading time is limited, so I gave priority to other books. I actually "read" these as audio books while doing yard work. Actual real reading is devoted to Star Trek novels at the present. That said, I'm interested in the Ransom Trilogy. I'm obviously pretty ignorant as to Lewis's writings I suppose, but I didn't realize he had written more fiction. I was only aware of Narnia, plus his theological treatises. I'll have to check out the Ransom Trilogy, as I'm sure I'd enjoy it, both as to their audience and as to their sci-fi subject matter (you are correct that I enjoy sci-fi).
Just looked up the Wikipedia article. Have you read The Dark Tower to go along with the trilogy? How do you like the series as a whole?
Thanks for the feedback and suggestions :) I wish I could read more, as I love it. If I could even put in an hour a day, I sure could cover a lot more ground after having not read enough fiction in the past. But alas, life gets in my way.