I had WK Bilsteins and now Koni FSD. The Bilsteins were horrible, and I would never recommend then. very rough and bouncy with poor handling and no feel of control. FSD's are great, outstanding handling and very controlled, flat ride, firm but not rough. They are not sold in the US though and $ 1400 shipped from Netherlands. They are more of a PITA to install the fronts, as the lower control arms had to be removed since the bodies are longer than stock.
Can't talk about any others, never tried them. I would much sooner put on new stock units and replace them every 40k than put on WK Bilsteins.
2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper Discoverer SRX 255/65/17, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.