If you put your speakers, Paradigm Studio 100's, in your post title you'd get more people who could give you specific advice.
Have you considered adding integrateds to your search? One approach could be waiting until you could spend $1000-ish used, & get a used Classe' or Plinius integrated; I wonder if you can really upgrade that much w/$400?
Have you considered adding integrateds to your search? One approach could be waiting until you could spend $1000-ish used, & get a used Classe' or Plinius integrated; I wonder if you can really upgrade that much w/$400?