Used both McCormack DNA 125 and Belles 150a with very good results. But the Rogue 120 mono blocks that I am using now are giving me the best results on the 3a sigs yet. (Detailed, warm and very musical.) Mark Obrien from Rogue audio used the 120's with the vandersteen 3a sigs at the 98 CES with much sucsess I hear. Hope I helped!
