Turntable upgrade

Groovetracer subplatter (new for P6) and Sutherland phono stage. Boom!

+1 for George's PolyTable Signature & the Sutherland Transimpedance TZ Vibe for moving coil cartridges.  Or swing for the fences and (as mentioned previously) the DS Audio. George is a GEM!

Happy hunting

Get a better phono preamp. I have the Rega P6  Exact 2 with an Aesthetix Rhea Eclipse. Sound is very special 

I had  a P5 with its RB700 arm and first upgraded the arm to the one that comes with the P8, the RB880. Huge difference (already had the TT_PSU). Subsequently I upgraded the table itself and actually like the look of it, although I must say the improvement in sound is not nearly as much as upgrading the arm itself. I assume you have the RB330 arm on the P6, so I would start with the arm if you don't want to take the full plunge to the P8.

Also, in my experience, Rega's cartridges are not nearly as good a value as their arms and tables. Try a different cartridge/phono stage combo, remembering to stay on the lighter side of cartridges. FWIW I have a van den Hul MC One special with a Sutherland Insight with LPS. I am very happy and the stylus on the cartridge lasts an especially long time.

Just remember to make sure the table is well isolated from vibrations. I put mine on top of a Townshend seismic platform which sits on a wall mounted shelf. My floor is suspended over a crawl space, and the sound improvement from putting the table on top of the platform/shelf combo was a dramatic improvement. 

I almost bought a P6 with Ania.  Had high expectations for the sound but it was one of the most disappointing sounding audio components I have experienced.  

Went with a Technics 1200GR and Audio Technica ART9 and what a complete treat this table has been.