Aren't the Bilstein front struts the 4600 series? Only the rears are 5100s iirc. Members have had issues with the bilsteins and I haven't seen them in an off-road environment on a WK or XK. On other vehicles I've seen then perform quite well.... but for these vehicles the best option, IMO, is the OME for the fronts. The difference in price isn't that drastic considering the work involved to change them and how long they last.