I love 6SN7s so a Cary preamp would be my recommendation. You can find good NOS/OS tubes to roll in order to fine tune the sound to your liking.
Tube preamp recommendation ...
Hi guys. I am looking for a tube preamp for my new system. At the moment its looking like either plinius or bedini power amp with Shahinian obelisks. I was thinking of trying a tube amp for a change and something that is a little it exotic and has to look nice as well. The souind should be very transaparent, wide, neutral and highly musical possibly with a touch of warmth.