Choice of Koetsu cartridges?


You guys recently helped with my choice of a Benz cartridge and I am more than happy with my Benz LP, the best sound I have heard in my vinyl system. I am planning to collect a small number of cartridges to use over the years. I have a Zyx Airy 3 as a spare. It's nice, but not a patch on the Benz for speed and dynamics particularly.
The other cartridge I loved was the Koetsu Rosewood signature, that I used exclusively for 3 years. I would like to move up a step in the Koetsu range, but which? Whatever I get, will be second hand, so it will depend on what appears on the Gon.
My vinyl system:
TW Accustic Raven one/Ortofon 309D
K&K phono stage
Viva Solista integrated amp
Acoustic Zen Adagio, but due for an upgrade ? Daedalus DA1 or Art Deco 8 signature.

I enjoy most genres of music, classical, opera in particular, Blues, Jazz, Singer songwriters, not much heavy rock.

You seem to have 2 choices, change the coil material or the body, or both, but that gets out of my price range, even 2nd hand. That is a crude simpification I know.
So choices would be:
Rosewood Signature Platinum
Various Urushis, all slightly different in output, magnets, coil windings, confusing in itself.
Onyx, as far as I know, the cheapest of the stone bodied Koetsu's
Anyone any opinions on this? I am looking for more of the Koetsu sound, plus better speed and across the frequency range neutrality, but without losing that undoubted Koetsu midrange magic, thanks.
david12
David, as a koetsu jade owner I thought I would chime in. The dyna xvs-1 is an excelent cartdridge as the multiple posts above have stated. If your looking to upgrade from the rosewood signature I would recomend one of the platinum models, a stone body if you can afford it.
Try different loadings 100, 500, 1000, the higher loading helps open up the sound at the frequency extremes.
As an aside, the 309D is a nice match for the low compliance Koetsu's
Good luck
Urushi Vermillion has very refined and magical midrange, a little shy in the frequency extremes. Allaerts is refined and magical from top to bottom, even the MKII.Same dynamics on both. Personal experience. Best.
Jean.
For the Ortofon 309D I would consider an SPU - I recently heard it on a friend's Raven AC with Ortofon 309D and really liked the combination. Very different from the Da Vinci/ZYX Universe or the Schroeder Reference/XV1 my friend runs as well, but the Ortofon combination is very nice in its own right.