The Sony a7II is the only full-frame mirrorless camera to offer in-body image stabilization systems and its performance is excellent. The body is comfortable to shoot with and offers a broad set of features that should appeal to both still and video shooters. The Sony a7 II has a 24.3MP resolution, great Full HD video capabilities and fast auto focus.
Before you start digging into the reviews, a few notes on choosing a cam that's right for you. You'll definitely want to consider frame rate, expressed as frames per second (fps). Some action cameras offer up to 240fps recording, while others only go to 30fps. For standard playback, 30fps is perfectly fine. It's when you want to slow footage down in editing to create dramatic scenes that frame rate matters. Footage captured at 240fps can be slowed down and played back smoothly at one-quarter speed. You may also want to go for a cinematic look, in which case you'll want one that has a 24fps capture option, the same speed used by most Hollywood productions.