Interesting thread we have here.
Here are some tracks I spotted quite recently:
The King of Fighters '97
Bali Stage (NeoGeo Performance Group)
http://www.youtube.com/watch?v=fyk6wEA4AEw
&
Seiken Densetsu 2 (Secret of Mana)
The Sorcerer (Hiroki Kikuta)
http://www.youtube.com/watch?v=JLWc6iG-iuI
-----------------
Street Fighter Zero 3
Chun-Li's Theme (Yuki Iwai)
http://www.youtube.com/watch?v=_EEv4c10JdU
&
Jazz Jackrabbit 3
Skygazer (Alexander Brandon)
http://www.youtube.com/watch?v=ohKyfeU5JNo
Staggering.