I hope it's a while before you need to replace the shocks. I recently replaced them on my '06 E46 ZHP coupe (60k miles) with KONI FSD (Frequency Selective Damping) shocks - kept the original springs. Those have been superceded by their Special Active model. I'd certainly consider them.
http://www.koni.com/en-US/Cars/Produ...pecial-Active/
__________________
____________________________________________
2015 BMW 228i in EstorilBlau II Metallic / Terra Dakota Leather - 6-speed manual, M Sport Package, Cold Weather Package, Lighting Package, Premium Package, Harman Kardon premium sound, Anti-theft alarm system, Blue Metallic Matt Accent Moldings, Aluminum Hexagon Interior Strips, Anthracite Headlining