Having bi-amped before-in hind sight,both amps should be matched.Soundstage and depth perspective will differ from amp to amp.I'm not sure I would want the Krell on top,but I suppose a quick listen would answer that question.
Pass might be a good direction:X600s/XA-60/100 on top.The pipes don't need tons of power for their towers.
Pass might be a good direction:X600s/XA-60/100 on top.The pipes don't need tons of power for their towers.