If accuracy means closeness to the original Hebrew, Aramaic, and Greek texts: The New American Standard Bible (NASB) is widely considered among the most literal word-for-word translations. It prioritizes formal equivalence, staying as close to the original syntax and vocabulary as English allows, though this can sometimes make it read less smoothly. The English Standard Version (ESV) is another highly literal translation that attempts to balance word-for-word accuracy with readability. If accuracy means conveying the original meaning in natural English: Translations like the New International Version (NIV) use "dynamic equivalence," translating thought-for-thought rather than word-for-word. Proponents argue this more accurately communicates what ancient readers would have understood. If you want access to the underlying scholarship: Interlinear Bibles (showing Greek/Hebrew alongside English) or study editions of critical texts like the Nestle-Aland Greek New Testament or Biblia Hebraica Stuttgartensia give you the closest thing to source documents, though these require some knowledge of the original languages. A practical note: Many scholars recommend comparing multiple translations when studying a passage carefully, since no single translation can capture every nuance. The differences between reputable modern translations are generally matters of emphasis rather than fundamental meaning for most passages. What kind of reading or study are you hoping to do? That might help narrow down what would work best for you.