At 215k it's time for another pair of struts and shocks. The car is a sport package 2007 BMW 335i. At this mileage I'd normally start to consider pulling the plug on major maintenance items, but I had the driveshaft rebuilt last week, and the car still drives really really well. And since a more modern replacement could run $35k, why not just put some money into the basics and see how far it can go? So, the front struts are getting weak. And the mounts in the rear knock when it's below 10F. The fronts are a pain to compress, but I've done it before. The question it: I can get the OEM Sachs set for around $400. But there's the Bilstein B4 line (available in "sport" to match the oem spring rate) for $330. Does anyone have any experience with the B4? In all honesty, I'd love something more pothole friendly, but don't want to change the springs. Longevity isn't as much of a concern, as I can't imagine this car will be on the road at 18 years and 315+k.