Hi Bruce,
I don't have my LS anymore, but I used to run Bridgestone Turanza ER300's in the size you're talking about and they were pretty quiet, gripped well and were a decent price when on one of those Buy 4 Pay 3 deals.
ER300's are what suits Euro luxury sedans, so probably what you're looking for.
I think there is a newer model too called Turanza Serenity Plus and those are on 4 for 3 promotion at the moment.
https://www.bridgestonetyres.com.au/...kBusOnly=false