DREAMCANCEL
KOFXI is pretty awesome, especially since most stores that carry it well sell it for no more than 14.99 USD.
Neo Geo Battle Coliseum on the other hand, is only worthwhile if you absolutely must have/play all of SNK/Playmore's games. I felt the gameplay was too simplistic and didn't balance the characters very well, not to mention that SNK boss syndrome has been compounded in the form of King Lion.