I have an Aesthetix Rhea Signature. Not only is it fantastic sounding with its tube based dual mono design but you can change the gain and loading settings on the fly with the remote for each of the three inputs separately. Once the unit is turned off, all of the settings for each of the three inputs remain in the system memory.
I bought mine on USAM for well under 4 grand but have put some money into NOS tubes. Also, support at Aesthetix located in CA is fantastic. End game phone stage for me.