JDM Bilstein PSS (BSSKIT) coilovers (bought used from Japan, ~30k miles)
Improvement in handling over OEM. Due for a rebuild sooner rather than later.
This suspension kit is one of the nicest you will find for this platform. This kit is not available for purchase in the US. Imported from Japan. The front driver side was making a slight knocking noise at low speeds. Mileage on the set from JP was approximately 30k and I had them on for around 10k. I have the Bilstein Spanner wrenches that I can include as well.
To get a new set of these into the US would run you around $2k.