Ayre V-5xe best tube pre-amp to match with?


I own an Ayre V-5xe power amp and strongly consider a very good tube pre - or the matching K-5xe pre amp from Ayre. Any suggestions?
frankpiet
I don't have a Ayre V-5xe but I 'm using the Herron VTSP-2 with my Ayre V-3 (discontinued) & the combination is dynamic, transparent & neutral sounding.
I am currently using an ARC LS-5 (GNSC mod) with excellent results. I would consider limiting your choices to units w true balanced output to optimize performance of the V-5XE.
In my experience, the BAT 51SE has mated very well with both my AYRE v1xe and v6x (will all bal runs).
thanks so far for your responds. one question to all of you: why didn´t you choosed an Ayre pre-amp?