Phono Stage for Conrad-Johnson CAV50

Consider a used Conrad-Johnson PV-9A (preferred) or a PV-10 full function preamp. Both would be a good match for the rest of your system and give you very good phono stage. For either, you'd need to best off using a cartridge with an output of 1.0mv or greater.
http://conradjohnson.com/It_just_sounds_right/classic-products.html

I am using a old Linn K9 MM cart.. Not sure what's best fit...

I don't know the specifics of the K9 cartridge, but the current Linn Adikt moving magnet cartridge (which replaces the K9 in the Linn lineup) has an output of 6.5mv which is a very high output cartridge. I suspect the older K9 has similar high output. This output will present no problem for the preamps I've suggested.

I got a Black Cube SE Finally, which received lots of good reviews. I am curious how it compare with these phono stage coming with full function pre-ampl.....