I would have to say, since this is on the military aspect of the Korean War, as well as the continuing cold war between North and South Korea today, I would like to stick with the original badge.
It would look good if Seoul was ever home to the Olympics.
On a side note, if you think about it, the Korean war never accually ended. It just went dormant and has been so for the past 60 years, and has been held back by the DMZ on the 38th parallell. Because of this, it can also be said that the Cold War never ended eather. It's just that the stalemate is now between the two Koreas. That's my take on it, but it does hold some merrit.