Help for the Deciding

I have like 19 itunes credits. The National Guard were giving out these little cards with song credits, and I need to use them by december.

However, my problem is, I haven't been listening to much music yet.

I have used one of them, for Eve 6 - Showerhead, and I love it. So with that sort of first time success, I want the other 19 to be perfect :(

I might use some of them to get my sister a nine-inch nails album, but *shrugs*

I like stuff like Damien Rice, Eve 6, HIM, System of a Down, Radiohead's earlier stuff, Stabilo, Jars of Clay, Jim Croce, and seriously just about all kinds of good ol' rock.

Suggestions?