Tube Preamp Connected to Accuphase A-50V?

I have an Accuphase A-50V now connected in balanced mode to a SS preamp (Krell KCT). I'd like to try a tubed preamp in my system, but am worried about potential problems such as DC leakage from tubed preamp or impedance mismatch. I would welcome advice and accounts of your experiences in connecting a tubed preamp to a solid state amp. (I haven't picked out a possible preamp as yet, and am open to suggestions.)