JMHO, but we would be sadly mistaken to compare the fighting ability (or lack thereof) of the Iraqi army to that of the North Koreans. If they come - and I also don't think they will - they will fight ferociously. Ask any living vet of the Korean War what that fight was like. 60 years later, they may be no better fed, but they are much better trained & equipped (in the land-war phase). If they come & we don't go nuclear, it will be a very bloody fight and won't be quick. JMO.
True, but this isn't exactly Kuwait vs Iraq either.
This time around the ROK Army alone is half a million, and the ROKAF has 700ish aircraft. And they're individually much closer to our equipment and proficiency standards than the guys up North.
Not saying it won't be extremely costly (seriously...why the fuck would you leave your capital city just over the DMZ), but one way to look at it is our current presence on deck is actually a small fraction of what host nation musters, while we also have a big presence just over the horizon sitting on Japan.