ahidalgo, you need to make your own decision based on what you need.
1, assuming you mean the 8320 which is listed in your profile. If your 8320 is working fine, no issues, I don't know that you need to upgrade the OS.
If you read through this thread: http://www.blackberryforums.com/gene...e-telecom.html
you will see user comments, bug fixed, bugs new, and decide if it will be an improvement to what you are running now.