Peamp/Amp for Thiel 3.7

I recently acquired the Thiels when I moved to a larger hifi room. The electronics I currently use are a Aesthetix calypso and a Primare A32 amp (250w/ch). The sound of these components was perfect for Wilson Sophias I had before I moved overseas but seem a little light on the low end now. I did not percieve the 3.7s to be thin on the low end when I auditioned them. In any event, I am considering upgrading my amp/preamp to better units to take advantage of the glorious coherence and soundstage of the 3.7s. If I have a budget of say $8-9000 for both, what would be a recommendation. 3.7 owners' opinions especially welcome.