I have a Toshiba SD-510e DVD/Audio player, and want to give the DVD-Audio side a good work out. I don't have any Audio discs yet, so am looking for recommendations so I don't get too disappointed with the format! I have full 5.1 surround, so want to appreciate some music that exploits this. I'm not into pop, but don't mind a bit of classical and rock. Anyone have any good choices?