Should I buy bumper plates or cast iron plates for a home gym?

Across the reviewers we read, the consensus is that bumper plates are worth it if you deadlift or do Olympic lifts and need to drop the bar, because they protect floors and are quieter. Cast iron plates are cheaper per pound and take up less space on the bar, making them a better value for slow grinding lifts where you won't be dropping weight. Many specialist-community posters own both.