The Aesthetix Callisto Signature retails for $13,000 including a $2,000 remote control. $11,000 without remote.
The ARC Ref 6 retails for $14,000.
The ARC Ref 10 retails for $30,000.
Ultimately, what’s important is the sound, as sfall states. However, the sound quality we get is usually limited by the amount of money we can afford to spend. I know that a cheaper system can sound better than a more expensive one, but if one carefully puts his system together, the more expensive one should sound better. I know that my system’s sound has improved as I have bought more expensive components.
How many boxes the component consists of is usually not a big factor in what we buy.
So I think that most people shopping for a preamp would compare the Callisto to the Ref 6 and feel that the Ref 10 is out of their price range. However, if $16,000 is chump change to you, you might compare the Callisto to the Ref 10.