I'm pretty certain that Bianco Icarus is the standard non metallic bright gloss white. It was called Bianco Cerberus on my 2006 Gallardo Coupe and then became Bianco Monocerus on my 2007 spyder but the shade looked exactly the same when parked side by side. It is not close to Suzuka Grey.

I have the standard four speaker system in my LP610-4. It's ok but I never really listen to it in the car. Unless you intend to do long boring drives in the Performante I doubt you'll miss not going for the upgraded system.