The overachieving Seattle defense is available and the underachieving Cincinnati defense is available. I wouldn't touch any of the others.
I like my odds within my conference which is all that I need to do to get into the playoffs...
...sure, in fantasy baseball you can trade three or four nominal players for one star (did it a few times this season!) but in Fantasy Football, trading is a lot harder. You have to trade stars to get stars.
-wtk