Mark, I couldn't possibly narrow it down to one best sounding out of the thousand or so I have, but I'll mention two inexpensive($6-$7)CDs with both excellent sound and performance of music I love: Rachmaninoff, Symphonic Dances,etc.(Batiz,Royal Philharmonic)Naxos 8.550583; Smetana, Ma Vlast(My Country),(Berglund, Dresden State Orchestra)Seraphim 73736.

-----------------------------------

Enjoy the music, not the equipment.