Presonus Central Station is the way to go.
1. It's passive compared to the Big Knob, and this new Presonus unit which means it should give a cleaner, more transparent sound.
2. All the wires on the Big knob and ill be on your desk. With the Central Station your desk will be cleaner with all the wires in your rack.
3. They have a nice small remote which can go on your desk.