Alright man. Lets say something really fast. I don't even feel like reading what everyone else has already said. Just a quick story.
You can go buy an LN Engineering bearing for about $600-700 and be at peace of mind. They RARELY ever fail and most defiantly have no where near the fail rate that the factory ones do. Put it in since you're pretty much already there, and be done with it....
Now, if you don't. You might save yourself that $600, but if it is going bad, or if it starts going bad in 10k miles, you're screwed. All of a sudden, BANG! New motor time... My 2002 S, got a new motor at about 100k miles do to an IMS failure and he paid for a new S motor from the factor and to get it installed. $19,000 out the door. If only he had changed the IMS bearing....
Don't let that be you!! 