The title says it all really. I can't reach to the 200-400, therefore I'm looking at these two lens options for wildlife and nature photography; 80-400 VR vs 70-200 VR II + TC20E III The 80-400 appears to have quite poor resolution at 400mm and slow AF, therefore I've been researching the second option. It's heavier and about twice as expensive, however I am wondering if the results from the very sharp 70-200 +TCx2 will be an improvement over the 80-400 ? Does the TC affect how well the VR works? I am also attracted to having the dual capability of the second option, ie: 70-200 2.8 and a 140-400 5.6. Any thoughts on this?