Is My McIntosh C52 Pre-amp The Weak Link?

I currently stream music, from Qobuz, via an Aurender N10 streamer into a McIntosh C52 pre-amp for D/A conversion, analogue output, into a McIntosh MC312 power amp, driving Magico A5 speakers. SQ IMHO is outstanding/perfect, but, I am an audiophile, so there is no such thing as perfect! Time to upgrade something. It is my opinion the C52 built in DAC is the weak link in the system? Thinking of upgrading the Aurender N10 to an Aurender A20 (streamer with built in DAC) and feed the analogue output into the C52. Your thoughts please, have I correctly identified the weak link in the system?