Christians: Are any of you against doing word studies with the KJV and Strong's Concordance?

Not against it. I don't use a Strong's Concordance, but I would if I needed to. I use a Zondervan Bible I've had for years, which compares three different versions of the New Testament at once. For the Old Testament, I have a Zondervan Bible which compares the ancient Greek text with English, word for word, and it is truly enlightening what you can learn. Zondervan is the name of the publishing company. Don't know if they are still around. I got my books about 30 years ago...