The Popularity of the New King James Version

It seems that the New King James Version of the Bible is very popular in many churches and with alot of people. It's advertised as replacing he "Thees and Thous" and archaic words of the King James Authorized Version. However, it goes beyond the simple Thees and Thous. Hell, for example is a reference to the Valley of the sons on Hinnom. It was in this place while the Israelites were taken into captivity that human sacrifices were made and so when the Jews returned they made it a DUMP or Refuse Heap. All the litter and waste of Israel was dumped into the Valley of the sons of Hinnom. It is referred to in the Greek as Gehenna. The NKJV translates Hell into Gehenna. Can you imagine what would have happened if the NKJV preceeded the KVJ Bible? We would be saying
"Go to Gehenna!" or "What the Gehenna is going on here?" or "Gehenna's Bells!" It would certainly change language a bit. However, even more disturbing is the fact that the Old Testament manuscript differs from the KJV Old Testament document, and it has changes in it. Compare Zechariah 13:6 between the various translations. Some say hands (KJV) some say Chest, some say between your arms (NKJV) some even say back. Quite a difference there between the translations! everything but legs. This should be a reference to the nail pierced hands of Jesus from the cross, but NKJV says between your arms! Quite a difference indeed! So, even though the NKJV is popular I ask, is it trustworthy? Is the HCSB, or NIV, or NASV, or NIV or TNIV, or RSV, or NRSV, or The Message, or the Net or any one of dozens of others trustworthy? This is a question we must ask ourselves and ask God. Which does God's Holy Spirit prefer? Which is the English translation God's Spirit has used and uses the most for all English speaking people. Yes the NKJV may be popular, but is it reliable?