After hearing of NuPrime a couple years ago at TAKES, the sound I heard never left me. Awesome. Then having a short audition again a very short while ago, this is what I want. My dilema is, can I mate my Audio Research SP 14 preamp with NuPrime amps, if I could afford a complete system,i would definitely take that route, but financially, I can only go halfway for now. I am deciding between, SP 9 bridged as monos,or ST 10, or Ref 20s, I am totally Exited to hear of the new Ref Evolutions, they sound like they will be something very special.