The Audible Illusions Modulus 3a as an upgrade to your own 2 might do the the trick. I've heard it in a good system driving a tube amp (Musical Reference?) and the imaging was to die for. Of course, the owner knew his stuff and had the system well set up.
Are there any $1500 tube preamps that that can compare with Tubes4hifi's SP14?
Reviews on the Tubes4hifi's SP14 are consistently positive and so many people are blown away by them. I haven't heard one but I want one. I want to upgrade and would like to know if there other ones that can hold up against the SP14 at the $1500 price point.