Help me find a pre-amp

Try a BAT VK-33SE tube pre or a VTL TL5.5 tube pre. They're a step above the rest in that price range. The BAT has a mono switch that sounds better with some material like King Crimson Red album for example. maybe Rogue Audio RP7

I just bought a used PS Audio, BHK Preamp that I hope to have by Monday or Tuesday. It’s a hybrid with a couple of tubes for the input stage that can easily be rolled to give you a warmer sound, so you can use either of your amps.

All the best.

Supratek’s are very musical sounding and quite affordable for what you get.

@OP. I am also looking for a new preamp.  My power amp is a BHK250. I have a PS Audio BHK preamp and I just finished home auditioning an LTA microZOTL preamp.  I prefer the microZOTL - it has a more delicate, but full smooth, sound.  I can hear more detail at a lower volume; voices are more natural; and instruments sound more realistic. The microZOTL is a great preamp and I may buy it.  

Today, I received a recently purchased Luxman CL-38uC preamp.  It is a beautiful piece of gear.  I plan to spend the next couple of days auditioning it and then decided between the microZOTL and CL-38uC, and sell the BHK preamp.

LTA has a very good 14-day home audition program, and you can get a fully loaded new one for just north of $5K.  It may be worth your while to look into it.  

Don’t forget to sprinkle some magic fuses and power cables in. Magical thinking is key!