Krell KAV 400xi v NAD Masters M3 v NAD C372

[basite]

krell is in a whole different league than NAD, if I were to choose between the three amps you mentioned, the Krell would definately be my pick.

Keep them spinning,
Bert.

[RGA]

Krell has done a good job marketing themselves - never like any of their amps with any gear but hey it's your dime.

If SS is your thing then you should probably add Sim Audio to the list - they have affordable amps that sound better than usual Solid State. My first choice would be Sugden but power is an issue.

The Sim gear is not excessively priced sound nice and have solid power and a good ten year warranty. http://www.simaudio.com/moonaudio.htm