no doubt about it, Def Leppard is one of the all time greats. However, they really lost their sound with the passing of Steve Clark. :(
Don't get me wrong, I still love Phil he's very talented and very technical, but, Steve had something special in his rhythms. Regarding Vivian? I dunno, he had big shoes to fill. He may be a better guitarist that Steve, but he never could fill his soul that Steve brought to the band.