Have had current system for many years (Rega Planar 3/ RB300/ Nagaoka MP11 Boron - Nain Nait - KEF Q4 - Arcam Alpha 5). I would love to replace the sylus on the MP11 but the Boron version seems unavailable so I guess I need to source a new cartridge. Ive seen Ortofon and Goldring mentioned as good choices does anyone know if they get near to the Nagaoka for all round musicality ? If Ortofon and Goldring would be good choices which models in particuar ? Thanks for any opinions.