Pl advise on Amp for listening to AOR on Klipsch RF7 Mk II via a custom built R2R NOS DAC

I was going to suggest crossover upgrades first.

Oh! Did not know that. As I don't have tuned ears, it sounded great to me when paired with a Krell and a Concept 16.5 separately. Perhaps because I did not have much exposure to listening to different speakers side by side. By the way, how are Paradigm Signature S8?

Sugden

Topping PA5 - $349! 110wpc@8ohms clipping. Why spend more?

@mr1398113 

The Paradigm Signature S8's are wonderful! I nearly bought a pair. They are 92db and +-2db@39hz but play down to 24hz. They could be a bit bright depending on the electronics and your room but with good electronics they're really nice.