The more I think about this, the more I'd go with Key and Price. I said ADavis earlier, but you're right. Cincy does have a weak secondary. I like what ADavis has done so far, but he is a rookie. A good rookie, but a rookie non-the-less. Finneran looked good against Cincy last week, so Key may just have a good game : ) I'd say at the worst, he'll get 60 yards with no score...at the worst.
Sorry, I should have thought a bit more before replying earlier.