I would not say that there is one best, but there are some very good translations. These are recommended::
KJV - King James Version
Its poetic style and beautiful rendering of the ORIGINAL Texts have made the KJV the most popularly loved version. To be noted is the fact that it was written in 1611, so the language may be heavy to contemporary speach.
Moreover, new Texts have been found to have a more complete understanding. But I highly recommen it.
NKJV - New King James Version
the modern language-updated version of the KJV. I, personally, use it.
NASB - New Americam Standard Bible
Probably the most accurate translation. Published in 1971, it gives the best translation of each original word, but it requires more attention and concentration in understanding.
more to come....