Have to disagree; I think
Fahrenheit 451 would make for a great discussion in a way I'm not sure the other books lend themselves. I also think the film would be a fun watch in conjunction, for those who like that kind of thing. Classics are worth rereading.
I'm currently reading another classic dystopian novel (
The Man in the High Castle and it's terrific and not dated. I know I'm late to the party on this one! But I'm not suffering from a surfeit of dystopias yet. I'll have to give the Amazon show a try once I'm done.