The older versions are more pure: The KJV, ASV, NASV etc. KJV is old English. The NKJV reads easier, however it is good to always refer back to the older versions. Some modern Bibles have omitted certain sections of scripture.
It is important to note that we will be judged by the words of Jesus, recorded in the gospels, those are most important. In some red letter Bibles the words of Jesus are in red.
