NI Bible, I've recently heard from a few people that the translations have been messed up and the words of Jesus have been switch with the words of Satan and vice versa

http://www.soulwinning.info/fd/lordship_salvation/niv.htm

curious if any of you have seen or heard about this?

nah, they're all beneficial. Its sometimes better off to compare a few translations if you're wondering about a verse.

Some people prefer KJV only, but I find that they all work together.

When I first came to Christ, I had a KJV bible, so thats what I basically started reading. He revealed a lot of stuff.

Grew up on and use NIV.

A significant difference in translations is the reading levels.