on my short list in a true bookshelf but stand mounted would be ( not in order ) Used
Ref 3a
Sonus Faber
NEAT
Vandersteen VLR
the KEF LS-50 for sure
any of the venerable LS 3/5a , one of my faves would be the KEF101, IF you read the white paper for the LS-50, you will see the trades they made....
......
have fun, do more listening than reading IF ya can..
great preamp you have IMO