Mr. Jazz I am using what i consider to be a great deal in the under 5 to 6K range, the Dehavilland Ultra Verve III. I have used it for around 3 years now, no itch to upgrade or feelings that I am missing something.
It fits 2 out of 3 of your criteria, under 5K, big soundstage, but it is not necessarily warm sounding. It uses a single 6SN7 tube and 2 cathode followers with a minimalist signal path. Lots of NOS tube options to tune, I am using a sylvania and love it!
Just my 2 cents, don't want to be a guy just recommending my stuff, I have owned and listened to lots of tube preamps, so it is merely my experience I am sharing...Will I upgrade - yes eventually but it will be way more expensive...
It fits 2 out of 3 of your criteria, under 5K, big soundstage, but it is not necessarily warm sounding. It uses a single 6SN7 tube and 2 cathode followers with a minimalist signal path. Lots of NOS tube options to tune, I am using a sylvania and love it!
Just my 2 cents, don't want to be a guy just recommending my stuff, I have owned and listened to lots of tube preamps, so it is merely my experience I am sharing...Will I upgrade - yes eventually but it will be way more expensive...