Okay, with the rear suspension on including rear pillowball top hats...I do have a bit of added low speed NVH. When it's quiet out e.g. at night I can detect faint clunk or clatter over rough roads, and sometimes a faint bird chirp as well.
At some point I'll try figuring out exactly which moving parts these sounds are coming from. Could be the pillowballs themselves, or could be the pillowballs just transmit noises that would be swallowed by the stock rubber top hats.
The noises are quiet enough that if I never silence them, I'll still be very happy with the car, assuming they don't get worse of course. They also passed the wife test...she hasn't made any comment on them and I think didn't notice them so far, except when I specifically mentioned the faint bird chirp.
The way it drives now with the "performance sport" coilovers and the top hats and the FLCA bushings...
. Definitely needed the rear suspension in to get the proper benefit! Full review will wait for alignment + lots of twisties + late night empty ramps, and also testing different damper settings. (And I'll post it in a new thread, not this one which I know is supposed to be about the upcoming R&T kit.)