[qspring]

It sounds like you have a collection of EFS lenses already. If you're not trying to spend a huge amount of money, I would stick with APS Sensor camera- 80D or 70D. Both will have a decent fps and excellent AF system.

If you want to go full frame - The 6D is excellent for low light photography and is going for a great price right now. You'll need the glass to pair with it. Down side is the AF system has less points than the 5DmarkIII. I've shot with 6D for live events and it works. You'll just have to adjust your shooting style to accommodate for your gears limitations. 5DmarkIII is a good choice; however, if I were going to shell out the cash I would wait till the mark IV is released so the body goes down in price.