Varishock SS shocks. They're $259/pair and were literally designed to be as close to a BMW M3's shock performance as possible.
Mark Savitske of SC&C worked with Varishock to design these. They rented a BMW M3 and removed the M3's shocks and put them on their shock dyno. Based on what the shock dyno said, they took the Varishock QS2 double adjustable shocks and made adjustments to the shocks until the performance was right in-line with what the BMW's shocks were. They would then install the QS2's and the BMW M3's shocks on their own test car (Typically Mark's own Monte Carlo) and the BMW and kept refining the shock settings until it performed as close to the M3's shocks did, as possible. Once they had the shock settings that they used to mimick the M3's shocks, they gave that info to Varishock and they made the SS shocks with the same valving and Compression/Rebound performance that they arrived at on the QS2's. Here is a link to the shocks:
http://scandc.com/new/node/960