Dylan!!! THIS IS SERIOUS!
I suggest a therapy with a 500mm f/4L IS II ASAP!
Since Neuro is a Dr, I might call him to help me with my "Red Ring Acquisition Syndrome"
Yeah ... and with the "help" you may very well end up buying the 600mm f/4L II 
You just never know
Quick update on 135L: after looking through the copy I received from BH, it seems like it has a tiny dust inside the lens. I called and asked for replacement. The new copy is on the way, it should be here this wed. Hope this coming lens has same date code UB(2013) as the 1st copy. BTW, it seems 2013 date lens came with new pinch cap.
