The first US edition of George Orwell’s Animal Farm paired Kabel with Electra (to good effect, I think):
http://fontsinuse.com/uses/4237/animal-farm-by-george-orwell-1st-us-edition
http://www.myfonts.com/fonts/linotype/electra/

Some other suggestion for serifs in a similar vein:
http://www.myfonts.com/fonts/linotype/fairfield/
http://www.myfonts.com/fonts/type-together/abril/
http://www.myfonts.com/fonts/linotype/new-caledonia/

I’ve also seen Kabel paired with Franklin Gothic more than once, but in those instances Kabel was the text face, and Franklin Gothic the headline:
http://www.myfonts.com/fonts/linotype/franklin-gothic/

I’m sure other posters can recommend more....

Caps or U&lc for the heads?

Thanks kthomps5!

Nick - caps for the heads.