If you can only have one Communist Daughter CD I'd say go for Soundtrack to The End, because you cannot miss hearing Soundtrack to The End and Not The Kid, and Speed of Sound (my current favorite Communist Daughter song) is found on both. But if you love good music you will end up wanting to own Lions & Lambs, even if only for the chance to listen to Don't Remember Me. And if you aren't sure about buying either cd, go online and find JamIntheVan and watch Communist Daughter perform. Then you'll understand. Enjoy!