I'm using my benchmark as the amp. I can see faces cringing already, but no the benchmark isn't that bad. Especially the HDR with the LM4562, which I have. Anyway, I have a Rag incoming this month, whenever it's back in stock this side of the pond. That said, I'm expecting a fairly large increase, coming from Theta rca single-ended on the DAC1 to xlr balanced on the Rag.