looking for a preamp for pass XA30.5

I just got a Pass XA30.5 and I'm looking for a preamp.  I would like to spend in the 2k range.  I'm interested in a tube pre but not married to the idea.  I would like something with a balanced design and balanced connections to compliment the Pass amp.  I was looking at the Schiit Freya+ but I'm not sure if its impedance characteristics would match with the Pass amp?  I've seen some used Pass Preamps on A-gon that look cool?  Any suggestions?