ATI AT4003 / ATI AT543NC for ATC SCM / Dyndaudio


Looking for an amp that will last a while and which is more than adequate for speakers like ATC SCM 19v2 or Dynaudio.
 
Seems like ATIs are great value and I want to explore the path of SS amp and Tube preamp. 

The only difference I can see(I am an amp noob) is SNR and THD are better for AT400x series but the wattage is quite different for both amps. Anyone tried both of them and can comment why would you pick one over the other?. I think AT600x are good but are just too bulky for my taste
geek101
Nope, I have not heard them directly.  I'm a Class AB guy, running fuse-upgraded Parasound JC1s, so I have no reason to hunt out ATI type equipment.  I have looked at the ATI pictures, that show a good power supply architecture in the AT543NC and variations.