Generations for me. I love how casually evil Soran is, and not for some lame and nonsensical quest for vengeance, but simply for his drug fix. Picard observes that in willing to engage in mass murder, he's no better than the Borg, who by taking away his family broke him so badly he so desperately needs the Nexus in the first place.
After a pause: "Nice try," Soran says, and goes about his business. Picard is correct, but Soran doesn't care. It's not as though he'll have to kill the millions on the planet personally; all he has to do is press a few buttons. It's an understated, brief moment, but one of the movies' most powerful and true to human nature. Some people are just dicks.