Generally, the Korean stuff isn't all that great - though I actually used to own a Korean copy of Empire, strangely enough!
The most dependable pressings are pretty much always from Japan. That doesn't mean it's necessarily the best-sounding pressing, a la Who's Next. But it's the most consistent way to go, no doubt.
In the case of Empire, though, just go for a USA or UK since there's no Japan pressing anyway.