The Dunlavy SC IVs sound so good it probably doesn't matter what you power it with. I have a Classe CA300 running them now and the sound is open, detailed, widely sound staged, with plenty of bass to spare. I tried them with the Bryston 4bst, but the treble is slightly cleaner, less harsh with the Classe. The SF line 3 helps as well. This setup sounds as good or better than any combination I've heard. But, I've never heard the SC IVs sound poorly.
