Got it, thanks! (As I thought, 20K more miles than NWA WorldBusiness Class and still not even First Class...)
I did check what type of seats it has. As per:
http://www.koreanair.com/local/na/gp...if_ni_main.jsp
and also seatmap for the plane (I can find on expedia.com if trying to make a booking for same flights), it seems that for ICN-HNL / HNL-ICN it is Prestige Plus. Not even flat sleeper, oh well...
Thanks for the response and help here! Just wanted to know what to expect (and whether the booking is worth it to keep or should I change to fly via NW through NRT instead).