Have had Several set of Öhlins and they are No1!
Have now a pair of KYB front shocks from a Lynx RS 600, (same as Doo RS 600 but a tad shorter) and they are really good too. (If they fit, the KYB RS shocks are REALY good and can be found cheap, just have them revalved for YOU)
Ryde Air 2,0 is second from the bottom, worse is only The Walker Evans Air.
The regular Walkers are decent if valved and assembled right, could have skipped fitting adjustment knobs on most of them though, "several clicks of no difference at all".
Most shocks are of the same "De Carbon" design and thus more or less the same, what differs is component quality and valving and how to accomplish adjustment of the dampening.