Blinds 80k/160k/ 20k
UTG 6m (assumed reg)
SB 1.8m (very tight wants to ladder haven't seen anything from them)
BB 4.5m (Weaker player pretty happy to call 3bets despite ICM)
UTG min raises to 320k, (he has previously folded a MR open on the btn to me.
What is your play here? Do we 3 bet and try to pick up the 640k or does anyone prefer a call trying to get BB to come along and stack off when we hit a set?