I recommend the VTL TL-6.5 signature line stage preamp. It is a hybrid preamp, with two 12AU7 tubes. It is very transparent and very flexible. I have this running my Lamm hybrid M2.1 monoblock amps.
(FYI: This replaced the Ayre K-1XE preamp that I had been using for nine years. The VTL is slightly better sonically and much better functionally than the Ayre, but the Ayre was a full function preamp, with a near reference phono stage.)
Note: Tube rolling is fairly easy and cheap due to the minimal number of tubes and the type. I went with the very neutral RFT 12AU7 tubes, which are fairly inexpensive.
Good luck in your search!
(FYI: This replaced the Ayre K-1XE preamp that I had been using for nine years. The VTL is slightly better sonically and much better functionally than the Ayre, but the Ayre was a full function preamp, with a near reference phono stage.)
Note: Tube rolling is fairly easy and cheap due to the minimal number of tubes and the type. I went with the very neutral RFT 12AU7 tubes, which are fairly inexpensive.
Good luck in your search!