I own the 70d and love it. The autofocus makes life so much easier for a lot of run and gun situations. And one of the things I personally found to help a ton with dynamic range is the Technicolor Cinestyle picture profile. It essentially allows you to lower the contrast further than the stock picture profiles allow. If you want to see an example, I have a quick comparison here between the canon 70d’s Neutral and Cinestyle:
I think you might find it interesting.
There's a good bit of debate out there on whether or not Cinestyle causes banding or makes it more difficult to bring back proper color, but I've had really good experiences with it. Hope you enjoy whatever you decide to purchase!