If you can't wait for next year's congressional races, Masson's Blog does a little early handicapping. Like Masson, I don't know a lot about the races outside my area of the state, but I'd say his "reasonable chance" for a swing from 7-2 Republican to 5-4 Republican and maybe even 5-4 Democratic is a bit of wishful thinking. That's nothing but a gut instinct based on the proven power of incumbency.