Should I go with a Reckless System or Panniers?

If you are doing sporty riding and camping off your bike in the Backcountry then go R80 Revolver. The R80 makes the bike easier to maneuver on single tracks and tight corners. It also saves you quite a bit of weight not having the racks and the mounting frames and wedges of the Backcountry. 

The Backcountry Panniers ​are designed for long-distance adventure touring and are better suited if you plan on staying in hotels vs. camping off the bike.