Don't know if this is much help to you as I have no experience of the cartridge other than I just found out how much it costs. It seems over priced (match wise) to the cost of the turntable (when these could be purchased new that it), but given that you were thinking of upgrading the tonearm, have you thought about the SME M2 ? these look more suited to your turntable, and I expect would be easier to fit, though whichever one you choose will need a custom plate making for it.
With the stock tonearm (which I happen to think is pretty good already (with the right cartridge), why not try a downgrade to a higher priced MM cartridge ? There are several makes out there that might suit that arm better than the Benz and give a better sound, and give a better sound because of this.
Ortofon, Goldring and Audio Technica make good, higher end MM cartridges, my favourite being the Audio Technica AT440mla, though your Benz being such a high end model, you might not be satisfied with it. However, AT make some pretty well regarded, more expensive models as do Ortofon, so this might be a way to go which doesn't involve altering your turntable. You can then, still upgrade the tonearm later on when funds permit, knowing you already have a good cartridge to put in it.
I hope this helps you.
Rge Spares by SoundsSupreme
