Matt,
I use SecondCopy.
Very flexible, easy to use. Lets you back up changed files only on shutdown (after you've done an initial full copy

). I like to copy rather then back up as you can get your files back or access them at any time without having to do a restore or having the software installed. I tried the trial version and liked it so much I bought the registered version

. It doesn't cost much for the registered version.
Al.