In the upcoming Descendants of the Sun, starring Lee Joong Ki & Song Hye Kyo, I'd replace Lee Joong Ki with Go Soo. He is perfect for the role and both he & SHK are stunningly beautiful people, they'd have explosive chemistry on screen.
Not that LJK isn't a cutie, but that's just it ... his features are too baby-faced for my liking. Not to mention that SHK looks visibly older than him, like a sister rather than a lover, as a result. I'm not too happy with their pairing.
P.S. I just read through all the suggestions and I saw that the Song Hye Kyo & Go Soo pairing has already been mentioned! Good thinking, @Alexandra ! I'm glad I'm not the only one who sees what amazing chemistry would exist between these two! :)
