The kjv is the perfect accompaniement for the Stronges concordence (in fact the only one that matches word for word with each) Any word you need to look up in the concordence can then be cross referenced with every other place that word is used in the bible and get a complete understanding of what each word means by how it's used elsewhere. KJV are great b/c they they have the doctrine with the original names and are easier to identify than how the other translations use many words for propitiation, sanctification, etc. In the KJV the proper words are used and with the concordence you can trace the true meaning of each. The NKJV can be used to and the sentence structure is much easier to follow.