Here are a couple of very interesting Watchtower quotes to show Jehovah's Witnesses who are trying to get you to use the New World Translation instead of your own Bible:
Reasoning Book (1989), Page 279: 'There are many translations of the Bible. Our Society encourages the use of a variety of them in order to make comparisons and to help students to grasp the real sense of the Scriptures. As you may know, the Bible was originally written in Hebrew, Aramaic, and Greek. So we appreciate what translators have done to put it into our language. Which Bible translation do you use?'
All Scripture Inspired Book (1990), Page 321: From the time that the magazine The Watchtower began to be published in 1879, the publications of the Watch Tower Society have quoted, cited, and referred to scores of different Bible translations. Thus, the Society has recognized the value of all of them and has made use of the good in all of them as being of value in clearing away religious confusion and setting forth the message of God.
I think those two quotes can be very useful.