Hi, I currently run a Sugden A21a into KLH Kendall speakers. Would never get rid of the Sugden but thinking of trying a different amp, try and change the sound, see what the KLH's will sound like with a different amp etc. I am considering Musical Fidelity M2Si or Cyrus One HD (retailers have good discounts on the ONe HD at the minute). Anyone out there with experience of either of these amps? I stream through Arcam St60 and have Naim CD5 cd player. Cheers John