Robert1234 - Another options would be a Tube Preamp built by Tom Tutay. Tom builds the preamps to order so it would take a couple of months to build and he can build it to your needs, but would be well worth it. I have had one of his preamps for about 6 years and it has excellent imaging and sound qualities. He uses a pair of 12SN7 tubes in his design which are the 12 volt versions of the 6SN7 tube and cost less.
mds
mds