I've only heard the 30.8 and the Int-60, but they were both outclassed by Perla Audio's Signature 50 integrated with Sopra 2's. All of them leaned toward the warm side of neutral which I like w/ the Sopra's, but you could easily tell the Perla Audio integrated had superior clarity and image specificity without sacrificing density and that relaxed liquid sound that the .8 series has. The Perla amp also uses only 5w in standby mode and never even gets warm, let alone Class A type of hot.
I also preferred an AVM integrated (not sure the model, roughly $10k range) to the comparative Pass offerings as well.
I also preferred an AVM integrated (not sure the model, roughly $10k range) to the comparative Pass offerings as well.