Should you get an ESV?

Since I will begin to preach from the ESV (English Standard Version) in January, some people in the church wonder if they’ll have to replace their NIV’s or will they still be able to follow.  It would be good to get the ESV, but it’s probably not necessary.  Compare them side-by-side:
Lk.14:25-27
NIV 25 Large crowds were traveling with Jesus, and turning to them he said: 26 “If anyone comes to me and does not hate his father and mother, his wife and children, his brothers and sisters—yes, even his own life—he cannot be my disciple. 27 And anyone who does not carry his cross and follow me cannot be my disciple.
ESV25Now great crowds accompanied him, and he turned and said to them, 26 “If anyone comes to me and does not hate his own father and mother and wife and children and brothers and sisters, yes, and even his own life, he cannot be my disciple. 27 Whoever does not bear his own cross and come after me cannot be my disciple.
1 Cor.15:33-34
NIV33 Do not be misled: “Bad company corrupts good character.” 34 Come back to your senses as you ought, and stop sinning; for there are some who are ignorant of God—I say this to your shame.
ESV: 33 Do not be deceived:“Bad company ruins good morals.” 34 Wake up from your drunken stupor, as is right, and do not go on sinning. For some have no knowledge of God.  I say this to your shame.
1 Pet.2:9-10
NIV9 But you are a chosen people, a royal priesthood, a holy nation, a people belonging to God, that you may declare the praises of him who called you out of darkness into his wonderful light. 10 Once you were not a people, but now you are the people of God; once you had not received mercy, but now you have received mercy.
ESV9But you are a chosen race, a royal priesthood, a holy nation, a people for his own possession, that you may proclaim the excellencies of him who called you out of darkness into his marvelous light. 10 Once you were not a people, but now you are God’s people; once you had not received mercy, but now you have received mercy.
Westminster Seminary bookstore has ESV study Bibles 40-43% off: http://www.wtsbooks.com/category-exec/category_id/619/nm/ESV_20Study_20Bibles/parent_id/21

Christian Book Distributors has ESV Bibles up to 44% off: http://www.christianbook.com/Christian/Books/cms_sp?sp=65042&event=1003MTRN|58674|1003