For street driving, the change in performance is imperceptible. Unless you're turning hot laps on at the track, it will be fine. Never heard of a warped disc from ceramic pads.
Akebono Euros are popular in the 996/997, BMW, Audi, and Mercedes communities. They're not some garbage brand, they're an OE supplier for McLaren.
Again, for street driving, they are perfectly safe and effective.
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