Do these programs actually do incremental backup on the hour? I thought this was just for ghosting your hard drive so you could go back to come state later in time? Not trying to be snarky, I'm asking honestly because I don't know.
You can have incremental backup on Norton Ghost. I am using on demand backup. But try it yourself - it is free to make a back up copies. You need a serial number (buy it) to restore a system or files. I do not know if this program is the best on the planet. I am using it for couple of years and I do not need anything more. By the way, backup and recovery is a must have tool. Should be a part of a system.