I primarily listen to classical and jazz and recently purchased a Blue Tack modified pair of Stax SR007A's. I have a KGST amplifier on the way to drive them. My old SRM-1/Mk-2 is doing duty until the new amplifier arrives. I'm considering upgrading my front end. I have Brennan B2's upstairs and down feeding an Mhdt Havana, and an Orchid and an Orchid SE. Will the Soekris 2541 or Denafrips Ares 15 or Pontus 15 provide a significant improvement? Has anyone heard all these options? Thanks.