Sorry but I can't just list one:
Sol Feace (sega cd) - All of the levels have a cd quality recorded soundtrack
http://www.youtube.com/watch?v=XTcWrvPe3g8&NR=1 - sample from level 3
Castlevania SoTN (ps1) - again, amazing music
Blaster Master (nes) - has some catchy, original beats
Super Metroid (snes) - Brinstar opening music - love this piece here
Act Raiser (snes) - first level opening song
edit: Megaman X
Sol Feace (sega cd) - All of the levels have a cd quality recorded soundtrack
http://www.youtube.com/watch?v=XTcWrvPe3g8&NR=1 - sample from level 3
Castlevania SoTN (ps1) - again, amazing music
Blaster Master (nes) - has some catchy, original beats
Super Metroid (snes) - Brinstar opening music - love this piece here
Act Raiser (snes) - first level opening song
edit: Megaman X