The following have worked for me.
Walker Audio Vivid, bettered Auric Illuminator (greater resolution and more energetic sound)
Walker Audio High Definition Links Mk II (lowered distortion, quieter background, improved resolution)
Ganymede VCS Roller Bearings (improved resolution and imaging)
Audiopoint Cones (improved imaging)
Marigo Tuning Dots and Tuning Bands (greater detail,dynamics, and improved imaging)