Until I read this thread, I've been thinking about a 70-300 f4-5.6L, or maybe the 100-400L. But I really haven't found a need for anything beyond my 80-200 magic drainpipe. But now that someone mentioned the 300mm f2.8L, it got me thinking REAL HARD...
Maybe I should just get that for the 300 end. That would save me the overlap with the 80-200, 24-105 and 135mm lenses I already have.
Now all I have to do is either hit the lottery, or wait for a nice tax refund, and definitely not walk into the "Big Kids' Candy Store"...aka, B&H Photo!
I want to buy 21mm f2.8, 35mm f1.4, 85mm f1.4 in 5 years for a full frame mirrorless system that currently either doesnt exist or has to get a LOOOOOOT better (Sony A7) before I would actually consider it.
Other than that ... nope. I have all lenses I need.