I'm sorry I can't comment on your specific spks. and int. amp driving them, but I've owned a few pieces of Arcam, with the Alpha 10 int. amp being the most refined. I liked them all but not enough to be satisfied in the long term. (Arcam, in my experience, has exc. cust. support.) My feeling is that the A75 is not in the same class as your spks. and I would think of replacing this piece. You said it yourself. The question is what would be a better replacement? PSB and NAD c375? Marantz 8004/Yamaha S1000/2000...???