Both the New American Bible, and the newer New American Bible Revised Edition (2011)as well as the NRSV or NRSV Catholic Edition have been made using the oldest extant copies of texts in the original languages. Both are excellent.
I prefer the NRSV just slightly but the footnotes in the NAB are very helpful. However, for reasons of brevity (I think), they are sometime too limited.
The older NAB retained some wording for doctrinal reasons that has now been corrected and reads pretty much as the NRSV does.
For example,
Is 7:14 “Therefore the Lord himself will give you this sign: the **virgin shall be with child **and bear a son, and shall name him Immanual.” (NAB)
Now,
Is:14 'Therefore the Lord himself will give you a sign; the young woman, pregnant and about to bear a son, shall name him Emmanuel." (NABRE)