If you like C64 SID-style music, try Mikron64's debut-EP "Sys49152".
He changed his name recently to "Miki Mikron", so go to
Audio -> Miki Mikron
to find some sound samples.
[Edit] Apparently he didn't just change his name, but also his musical style. Be sure to check out the tracks from SYS49152, not the newer ones. They are not SID at all. Shame. [/Edit]