I am familiar with the Aesthetix Calypso and while it is not a warm preamp, it does respond to the tubes you put in it, so you can adjust the sound with tubes. It has a remote with balance control, which I like.
The only drawback with the tubes is that the tube that handles voltage amplification is a 12AX7, which is not as common and is usually more expensive than other tube types for NOS tubes. For current production tubes, cost is not a factor.
I don't know how it compares with the other preamps mentioned, but it's a good preamp and would work well in your system with the right tubes.
Buy your tubes from a reputable dealer and talk to them about what you want soundwise before placing an order. That will save you a lot of money and help ensure you get the sound you want.Some reputable dealers, but not all, are:
Upscale Audio
Brent Jessee
Vintage Tube Services
Jim McShane
Tubemonger
There are more. Just search the archives for "tube dealers" and you’ll find a number of threads on this topic.