Winjar I never heared about Denzo but I bought the Tractive shocks from Holland which are also sold under the Touratech brand name with different looking anodizing for roughly 15% more...I still have not mounted them but they better be good for almost 4 grand...But if Stick runs them I feel confident
Stock shocks are not bad but I like the suspension to be stiffer and the shock dampening to be smoother with more motorcycle specific valves than the stock units...Also get the adjustable steering dampener from Holland that is made by Hyperpro and also sold under the TT and Yacugar name...Expensive but hopefully worth it but I will run this bike another 2 + years until the all new R1300GS has been out for a year 

but would be nice.