I have one called "Libertango"by Piazzolla for two pianos. Is that the one you are referring to?
Check out Milhaud's Sacramouche. It consists of three pieces for two pianos. It's sort of Brazilian, Cuban style. Very cool. Sounds like fun to play
Brahms Hungarian Dances arranged for two pianos are also good.
Tchaikovsky Symphony 6 transcribed for two pianos.
I don't know what level you are playing at so I'm just suggesting random stuff.
