Hey Simon,
As can be seen on the pic's we use the, somewhat more expensive, adjustable's on the Endurance bike. Only set back is they only come in eye to eye, so one has to change the connection to the swing. As you probably know Hagon are based on the old Girling's.
Have even tried the idiot expensive Ohlins once on a CB racer, but they too were not better than the Koni's.
Never experienced prob's with the Hagons so far. Big bonus is you can get every length, spring and damping setting for one price. Stainless springs, all black you name it.
But it is kind of a 'budget' shock.