I have the Hero 3 Black. I think getting some good aftermarket editing software is going to provide much more value than any extra features the premium models have. The GoPro software is limited to working with footage only from GoPro cameras.
The wireless feature is very nice because you can make adjustments in real time instead of doing some filming, uploading, viewing, adjusting, recording, uploading, viewing ad nauseum until the angle is perfect. Instead you view the cameras image from your iPhone or iPad.