I needed some more reach for some upcoming stories, so finally bought the much touted Sony SEL70350G 70-350mm lens. After mostly shooting with fast primes and F4 zoom, it took a bit of practice to get used to shooting with a much slower variable aperture zoom of F4.5-6.3. 

This is a sharp lens all the way to 350mm (525mm full frame equivalent), but it does require more light, otherwise you'll get a lot of noise. Late morning, and late afternoon is best, you can get sharp hand held and low noise photos at 500/s shutter speed. Which is the best part of about this APS-C lens. It's quite compact and light, and not much bigger than my 18-105 F4 zoom. So something you can just throw in your bag without thinking too much about it.

There is still a niche for the 55-210mm lens though for documentary photography. That lens is tiny for the reach. Unfortunately mine has some fungus damage due to using it in the rain. Might pick up another on the cheap second hand to complement this.