I'd take this. Morrow has the talent to be a beast, but he's starting the year injured, and if his control problems return he could be in for a terrible year. I'm betting he'll be good, but he's inherently riskier than Haren, a proven commidity. Haren was a beast last year after moving to the Angels and a park that better suits him. Some people are down on him because of his performance in Arizona, but that awful bullpen and park really hurt him. I've seen him ranked as high as top 10 and I'd bet on a top 15 finish. I like Marmol much better than Papelbon as his Ks alone offer crazy value and he has significantly better job security.
Obviously, if yo can find a way to make the deal with Cordero instead, you should, but this one is nice enough as is.