The ohlins are avaible in France and Italy for about 3500£,and as Michael K says they are the best ones avaible!!!
Then you have the other gr.n suspensions,with separate gas tank and monotube,as the proflex,that exists in two different diameters,45mm and the jumbo 55mm,and the dynamics.
All these are height adjustable and have something like 30adjustable positions for rebound,30 for high speed damping and 30 for low speed damping,are really made for hard use and will absorb the shocks better than the bitube ones even if they are stiffer.
Then you have the heigh adjustable bitube(twin cylinder)suspension as the street proflex,k and amp;w,hks hyper damper and some ralliart models.These are better quality than standard,stiffer,height adjustable and has a few adjustments in rebound,but has nothing to do with the gr.n ones as the tecnology is as the standard ones,bitube(twin cylinder,and will be less resistant under hard use.
Then you have the non adjustable monotube shocks,that have the same technology as the gr.n ones but doesn't have a separate gas tank and doesn't have any adjustment.They exist with high adjustable springs(there are ohlins like that in japan),or with normal springs as the standard ones.The monotube type front shocks have usally a bigger diameter of the sliding metal tube,I don't know the correct name for that,than the bitube ones as they are fitted upside down in the shock itself.
The non adjustable monotube shocks are anyway better than the bitube height adjustable ones for hard use and they will last longer.