Based upon what my ears tell me (and somewhat in contradiction to MF's recent review in Stereophile), Theta's Enterprise monoblocks (or any Theta amp, for that matter) have beautiful midrange for a SS amp. The Citadels are rumored to be even better. I picked up a pair of Enterprises to power my Thiels, and the resulting midrange is very natural and musical. Of course, soundstage and imaging are really where the Thetas excel.
Tom.
Tom.