Image backup software recommendations?

I have 2 Macs with 10.6.8. Before I install the latest Mountain Lion, I want to make image backups of both drives. I've read several reviews online but not from any "household name" sources. I'm wondering if anyone on this forum has experience with any of these products?

By "image backup" do you mean an identical clone of your HDD? If so, you can use SuperDuper! or Carbon Copy Clone (CCC). I'm pretty sure both work with SL, but be sure to verify that on their websites. Those 2 are used and recommended by the majority of our forum members.

Yes I mean an identical clone of my HDD, thanks for the recommendation of the two products referenced.