My IS 250 AWD doesn't feel very floaty like other members, I don't know if that's specific to RWD (I think I remember seeing that on a thread somewhere here). The body doesn't roll very far when I push it hard and my ride was pretty firm (not sure if the hard compound Goodyears were a factor).

 

I've dealt with German cars and honestly you handle it today and the dearer will tomorrow. they break down too often...