Which defense to start atlanta vs houston or houston vs atlanta?

i currently have both def's on my team and i was hoping for some opinions. atlanta goes against an injured houston offense. andre johnson, ahman green, jocoby jones all are hurt. all they have is schaub and owen daniels. or should i play houston against a struggling atlanta off. they still have dunn, norwood, crumbler, roddy white but they also have an inconsistant qb harrington( he did well against carolina but was that a fluke). i also have a last resort of picking up seatle's defense vs 49ers