I had my alternator checked out an Alternator shop (on the truck) and it checked out fine. Well actually all they did was check the voltage readout at the battery with the truck running... but they said it was charging just fine. But yeah I guess it could have a bad bearing inside and still read that it's charging the system normally. One way to find out for sure is by removing the alternator and spinning the pulley to hear if it's making a noise. That will be on my list of things to try... and definetly something I will check before pulling my Power Steering Pump.
I checked my Idler Pulley again lastnight and it was still fine. I even removed it completely and ran the engine but the whine was still there.
We're getting close boys!! Soon I'll figure out WTF is making this annoying sound
Thanks for all the help. Will continue to update my progress so that maybe this post can help someone else down the road.