Audio Research Ref5SE should be a decent pairing. But 10k input impedance is minimum and borderline. I think you may actually be better off upgrading to a very good solid state preamp in your case.
Tube preamp match with Solid Stare amp
I'm looking for recommendations for a balanced TUBE pre amplifier..preferably one that also has a phono input.. with a low output impedance. I'm currently using an Coda No.8..which was designed with balanced in mind.. but it has a pretty low balanced input impedance of just 10k ohms. Price.. I wouldn't like to spend more than 6k.
Thank you all :)