Quote Originally Posted by Sean Setters View Post
What kind of capabilities/features were you looking for in the replacement lens?
Small, compact and the highest IQ.

Really the 100-400mm fits that bill.
But knowing myself I will end up with just two I am choosing from.
The 300mm f/2.8L II or the 400mm DO II.
It will probably end up being the 300mm.

I debated for to long between the 600mm and 500mm II, I just couldn't make the decision.

I finally made the decision and today I am waiting on the big brown truck to arrive. I went with the 500mm II because of the size and weight.
That said the 400mm DO may be to close to the 500mm for it to be a contender.