I'm in the market for an MC cartridge that comes close to my London Decca Reference cartridge in terms of dynamics, immediacy, and front row presentation.
Difficult to beat, definitely not ortofon. I get to listen to Decca London in an arche headshell on an FR 66s regularly. You really need a good FR or a linear tracker with it from what I understand. It is high maintenance, but when playing right it is fast and liquid and transparent, like a Lyra but even more transparent and way more musical. You can beat it with a vdh stradivarius on a similar sound but too expensive. There are also cheaper variations of Decca supposed to be quite good. Why don't you stick to London, it can be refurbed pretty cheap by John Wright in the UK