new quietest cars

[vitalim91]

Hi Im looking at the new luxury cars. I like the new 5 E60 , e class and the gs 430. I was wandering which of these is a quieter car. Its always seemed Lexus has been the quietest, but car anddriver wrote the new 5 is the now the quietest at full throttle? Does anyone know the decibel ratings on the cars.,
Thanks

[kman10587]

Test drive all three, but I'm betting on the GS 430. My mom has a GS 300 and it's the quietest, smoothest car I've ever driven.