For bindings I would recommend
Rome Targa Snowboard Binding from Backcountry.com
For snowboard I would recommend
Never Summer Heritage Snowboard from Backcountry.com
Im the same height, weight and skill as you. These are what I've found, they are more freeride biased though so if your looking for more park oriented gear I wouldn't recommend this combo.
Edit: For length go with the 158 and again if your wanting to hit the park a lot this is far too big for it.