The original is amazing. Also it is the second part of a "trilogy" the other two movies in the "trilogy" (which have nothing to do with each other so the only thing that makes it a trilogy is that critics say it is) are also very, very good. The second one seems to have been the only clear commercial success of the three, but to me they are all amazing.
http://en.wikipedia.org/wiki/The_Vengeance_Trilogy