I am looking for a top quality 400mm solution with some flexibility. I am currently using a 70-200VR and a 80-400 and I want to improve IQ on the longer end. Having a nice fast lens for sport would be nice too... I was thinking of the following options: 200VR + TC2 300VR + TC1.4 200-400VR applications: sport and wildlife I am hesitating between the versatility and the ease of use of a zoom ("locking" the target @200mm, then zooming in), and the top quality of primes. Would it make sense to combine a 200VR with a 2xTC to have the best 200mm lens and also an excellent 400mm f4 ? Or the 300mm 2.8 to get a 420mm f4 ? Or is the best solution the 200-400VR I want VR anyway, as a kind of backup solution to be able to shoot hand held or with a monopod when I don't have time to set up a tripod for wildlife. Any suggestion ?