I've used an Aesthetix Calypso Signature, ARC Ref5SE, and now an ARC Ref6 with the Sanders Magtech. They all worked well with it. However, I've never tried a solid state preamp with the Sanders so can't comment on how much better or worse a solid state pre would be over a tube pre.
I can say than the Ref5SE stomped the Calypso Signature, which isn't surprising given that it's much more expensive. The Ref6 is even better than the Ref5SE and is one of the few components that lived up to the Internet hype.