don't see a point swapping out the MC5 with a Primacy....not like Primacy is alot better in terms of performance
Its not like you drive fast and sapu corner day in day out
unless you are going for PS4 or P Zero 4, then i guess its more worth it.

just my 2 cents

Primacy is not that range topping over MC5 comfort in my opinion
considering you gonna top up at least 1k for the new dough nuts....

if really seeking comfort, i would sound proof the entire car with proper sound proofing material, improve overall NVH....