Correction regarding the New American Standard Bible: it was updated in 1995 and some of the hebrew and greek actually was re-researched. I haven't been able to find out which, however. I am curious, so I may look it up later and see if I can find out.
The NAS study is one of 4 that I use. Greek and Hebrew
In most instances the 23rd edition of the Nestle Greek New Testament was followed and the lastest edition of Rudolph Kittel's Biblia Hebraica has been employed together with the most recent light from lexicography, cognate languages, and the Dead Sea Scrolls.