Should I buy a drill-only kit or a drill/impact driver combo?

Mainstream reviewers and community threads generally recommend a drill/impact combo if you plan to drive a lot of screws or fasteners, since the impact driver handles long screws and lag bolts far better than a drill alone. Combo kits like the DeWalt DCK240C2 and brushless DCK277D2 are frequently cited as strong value because you get two tools, two batteries, and a charger.