CKR 1969,
I can say that you'll be disappointed because I've heard both of them now you haven't obviously, the Sim audio 861 amplifier will leave the 218 in the dust you will hear stuff way in the background in the small little details that you won't hear with the 218 because unfortunately it uses local feedback which masks those fine little details, The background is much blacker with the 861 so until you hear them both side by side like I have you obviously are talking from being uninformed unfortunately and I'm not saying that the 218 is a bad sounding amp it's very good it's just not as good as the new 861.