Kids/Concert photo rig for Nikon 70-200 2,8 lens? Hello, I’m humbly asking advice on what rig to pursue. My old D90 is pining for the fjords and I want to replace it. I mainly take photos of my kids with my phone but I really like shooting with a real camera – and I regularly take concert photos of mainly jazz groups and orchestras. Fairly low light situations. Web publications mostly but possi…