** Of those particular 5 versions **
NASB - best for original language word study, shows some bias
NIV 2011 - best for accuracy and precision, shows moderate amount of bias and excessive inclusive language
RSV - excellent for accuracy and precision (though less than the NIV) and excellent for lack of bias; good for original language word study. Biggest problems: dated translation (1950s); lack of inclusive language (although none is better than too much)
The best translations:
** If you regularly engage in original language word study **
NASB - best 66-book Bible
RSV-CE - best if you are Roman Catholic
** for accuracy and precision, in order **
- New Jerusalem Bible (non-traditional wording excels at precision; note: Roman Catholic Scriptures included)
- Revised English Bible (available with and without Apocrypha)
- New Revised Standard Bible (available with and without Apocrypha and in Catholic Edition; excessive inclusive language)
- Holman Christian Standard Bible 2010 (some non-traditional wording; conservative Protestant bias; 66-book Bible only)
- New International Version 2011 (conservative Protestant bias; 66-book Bible only; excessive inclusive language)
** very easy-to-read Bibles **
- Contemporary English Version - has won awards; 5th grade level
- New American Bible - for Roman Catholics; claimed 5th grade reading level but I think at least 7th; good, easy-to-understand (Catholic biased) notes included in all editions
- Good News Translation - available with or without Apocrypha and Catholic Edition; I recommend this for adults who do not enjoy reading; very "smooth" and easy reading style without being too simple in wording. Most Bibles read like a history textbook; this does not.
New International Reader's Version - 3rd grade reading level, CEV is superior
More info and step-by-step guide:
http://www.BibleSelector.com/