The most powerful hammer drills are usually larger and heavier than other drills but there are also compact versions available. The best one for you must be chosen keeping in mind what you will do with it.
If you already own a drill driver and only need a hammer drill once in a while around the house for fixing into masonry, you might find a corded hammer drill will suit. Some cordless drills include the ability to use it without the hammer mode and make a great all round drill for the enthusiastic DIY-er.
We have picked a selection here that includes models that are suitable for the professional electrician, for example, and others that will do a great job around the home.