Sorry for asking so many questions lately, but I want to make good choices...What are the advantages/disadvantages to the breaker and drop hammer? The two that comes to mind for me is that the drop hammer can't break vertical concrete, however it looks like it may be less abusive to the machine. I don't know of anyone that has a drop hammer, so if I had to make a choice, which would be better. I plan to use the tool to tear out sidewalks, driveways, etc. thanks.