Preamp for monoblock BAT amps


I have a pair of monoblock BAT VK-55 SE's driving Vandersteen Fives. Front end concentrates almost exclusively on analog reproduction (self-built Lenco-based table with Kuzma Stogi Reference arm/ZYX Airy 3 cartridge/Custom built tube phono stage).

I am currently in the market for a preamplifier to marry with the rest. If it were you, which pieces on the used market would you first audition? I am open to tubes, SS, or passive. I currently have a Bent NOH which ALWAYS sounds excellent, but has somewhat limited headroom in this configuration.
4yanx
I 'm using the Audio Research REF 3 with the BAT VK1000
monoblocks , it is a marriage in heaven , as the BAT's do have a perfect input impedance which the AR likes to see.( 100kOhm)
Something from BAT would be a logical choice. Ayre K1, Aesthetix, and maybe the ARC that Hansk46 mentions, but if you can't audition it first, I would pass on it.
How long are your interconnect cables? Do you want to drive the BAT balanced (which is what its designed for)?