I would: Kiss: Han Hyo Joo Marry: Han Ji Hye and if I had to kill one of these three I would kill Lee Yo Won (simply because I've never seen a drama with her^^) sorry!
Marry - Lee Min Ki Kiss - Yoon Shi Yoon (on a cheek..maybe, haven't seen him in many things) Kill - Kim Hyun Joong (he was kind of ok in Inspiring Generation, but not so in BoF)