I own equipment from both PrimaLuna and McIntosh. (Evo 300 Power amp, McIntosh C2300, and MCD-1100.)
As for reliability, I’d consider the Evo Floyd and McIntosh to be a draw. The PL gear is built to a very high standard as is most McIntosh gear.
I really enjoy my Evo 300, but in this case the MA352 is probably the safer bet. Not because the Floyd is bad, but I’ve read reviews on that unit that read as if it was just “fair”. PrimaLuna’s wheelhouse is tube-based equipment.
Also, the EQ on the 352 may be of more help to you with your stated hearing imbalance, potentially helping with any future hearing issues that occur as we all age.