Which preamp for Quicksilver mono amps?

I use an Audio Research SP9 pre with my Mid Monos. It's a good match. Don't have any experience with other QS gear.

I use an Audio By Van Aistine Vision RB solid state preamp with my Quicksilver Minimite tube monoblocks and they sound great together!  I paid $1000 for the preamp new a few months ago. I also ordered an AVA NP1 power amplifier which is presently being built. This amplifier has the new AVA nesting architecture that is supposed to be a significant improvement in overall clarity of the source. 

Best of luck in your search for a  preamp! 👍

Aric Audio Super 6SN7 Linestage with Mid Monos