I’m not a fan of the Marantz house sound. I used to own the (unmodded) 8005, sold it because imho the treble was m.i.a. Fwiw when I heard the SA-10 at a dealer a few years ago it sounded like the 8005 with more expensive casework.
I put my bias about Marantz out there so you can contextualize my opinion. I would at least try to explore some competitors, hopefully in your own system, before pulling the trigger