The Mutech RM Kanda Hyabusa

Channel D does not list an input impedance for the L20 only that as long as the cartridge has on impedance less than 25 ohms it will function well in current mode. The L20 also has  voltage mode and MM inputs. It is the quietest phono stage made and it also costs $43,000. The Lino is $2000 some odd dollars and does most of what the L20 does but it is not as quiet. It is however in there with the higher echelon.  

What they say suggests that the input impedance of the Channel D L20 (odd name for a very expensive phono stage) must be less than 25 ohms, but to work well iin current mode with cartridges like the Mustek or the Haniwa would require a phono input impedance of less than 1 ohm.  The field of choice is quite narrow at that specification, but like I said, these cartridges can drive in voltage mode, providing there is enough gain available.  Same old problem.  Didn't mean to side track your discussion.  One of these days I will have to buy a current drive phono stage to satisfy my own fascination with the idea.

It's full name is the Seta L20. But this is the one getting the very positive reviews http://www.channld.com/seta/linoC2.html  
If you go to the specification section in the manual they list the input impedance as less than one ohm. I was also mistaken. It will only work with cartridges <10 ohms not 25. The lower the cartridge impedance the higher the gain. Up to 85 dB if you use the highest gain setting. Inputs are only balanced so people might have to rewire their tonearms, no problem for you. There is also an RIAA bypass so you can use it with Channel D's software RIAA correction. I already have Pure Vinyl and I am dying to give it a try. 

"<10 ohms", makes more sense to me, especially if input Z is <1 ohm.  You'd be surprised to find that most of the phono stages that claim current drive operation actually have much higher input Z, which means they cannot really operate fully on current drive with some of the cartridges that have very low internal resistance.

It certainly seems to be the way to go with very low impedance low output cartridges. I'm psyched to try it.