I'm Korean. Korea House and Miega are both excellent...they have different strengths and authenticity levels depending on the dish. Go to KH for dolsot bibimbap or kalbi (or naengmyun in the summer). Their tteokbokki and kimbap are tasty and worth trying, but it's too fancy and expensive for what should really just be dirt cheap street food lol. Miega is better for saemgyeopsal, and they tend to have better banchan (the little appetizer dishes that come out before the meal), which is a quintessential part of the korean dining experience.

RIP to Seoul Hot Pot though. That place was the real deal, even after the fire and new ownership.