If you liked the Helikon (as far as it goes, and it is a great cartridge), then the next logical step up IMO would be either a Titan, Transfiguration W (or lower output V), or maaaybee a vdH Condor.
From a value standpoint, the Tranny (which I own) beats all the others because they're available at a 50% discount! The Tranny also got a slight edge compared with the Titan in a Stereophile review FWIW. I can put you in touch with someone who went from a Helikon to a Transfiguration W if you like.
You have a nice system, though you didn't mention any listening preferences. As always with moving coil cartridges, loading is critical! Also, you could definitely (again IMO) benefit from a tonearm cable change to: Silver Breeze, Hovland Music Groove, or if you can afford the very best (IMO) the Purist Venustas or (yikes $$$!!) Dominus.
From a value standpoint, the Tranny (which I own) beats all the others because they're available at a 50% discount! The Tranny also got a slight edge compared with the Titan in a Stereophile review FWIW. I can put you in touch with someone who went from a Helikon to a Transfiguration W if you like.
You have a nice system, though you didn't mention any listening preferences. As always with moving coil cartridges, loading is critical! Also, you could definitely (again IMO) benefit from a tonearm cable change to: Silver Breeze, Hovland Music Groove, or if you can afford the very best (IMO) the Purist Venustas or (yikes $$$!!) Dominus.