I just put a Ohlins S46DR1 in my XTR.. 402 euros from OTR..
not had a chance to give it a good work out yet... I think
it will need a re-valve as they are tuned for mainly road with
light off road use...

Ohlins / Wilbers / WP are the way to go... There are a few others
but I have not riden on them...

Hagon shocks... I have seen inside them.. The word crude springs
to mined...
When it was fully compressed the damping valve left the oil & went into
gas section of the body... no floating oil/gas separator..
The piston wasn't sealed to the body buy a o-ring or lip seal so oil
could flow around the piston instead of though the control valve
( I use the team control valve very losely here)

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Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...