Just would like to refer to the OP and remind people that the budget sits around the 1-1.5k mark, making 80% of the suggested lenses far out of reach.


More on topic, I also have a 100-400 and have no complaints whatsoever. Considering its versatility it is a light lens with lots of uses. The IQ I have gotten out of it is very good, certainly L quality if nothing else. If you are looking to spend about 1500 or so, I would say that it is your best option to cover all your bases.