My ST had the Z23 kit front and rear when I bought it. My experience spans 16 months of use (about 4k miles) from 15 degrees to 95 degrees, from stop and go city to relatively hard use on mountain roads (tail of the dragon, etc).
IMHO, I believe the powerstop z23 kit would be plenty for the vast majority of drivers on the street. The brake dust was super mild and you literally don’t need wheel cleaner.. soapy water and a rag takes the dust off immediately. Zero brake noise, and they honestly had decent bite even under 20 degrees outside.
The initial bite is a bit soft, but overall great performance. Imho, they’re good to go, especially since rock auto currently has an $80 instant rebate on them.
if shop around you could do a full RS Brembo and frankenbrake mod for about $350 more.. do that with powerstop z23 kit and you have a very good street setup for around $750 for F&R.