If I really want to enjoy my Bible study, I make use of every available version, lol.
As for the main, I think it's KJV, but because of the maketh, doeth, saith, I think NKJV is simplified.
AMP, NLT, MSG, KJV, NKJV, Goodnews, RSV... I love to use all together. It helps one understand the Bible...