Help need an integrated amp for Tannoy Stirling

I am currently using a Sansui AU-717 to amplify my Tannoy Prestige Stirling SE speakers. The sound is characterized by listener fatigue and is a little bit like a scream. Before these speakers, I had Totem Hawk and the sound was OK, maybe not a very full sound but very listenable and enjoyable. Before I listened almost always an analog source LENCO L 70 modified plint and now I like to listen to more cd because of that. I'm sad because I don't like the sound anymore.
The Tannoy I bought them new and now they have about 200 hrs. Any thoughts about these, or other amps using the Tannoy Stirling speakers?
Thank you very much,
Romeo