Holy crap, I wouldn't touch Zimmermann or Cueto with a 10 foot pole at those prices. Samardzija put up about the same WAR as the former and is much more appealing at 4/64.
One pitcher out of each of the following groups would be an effective and fiscally responsible plan in my books:
Group 1:
Samardzija (4/64), Kazmir (3/42), Iwakuma (3/42), Kennedy (3/39)*, Anderson (3/33)*, Lackey (2/30)
Group 2:
Colon (1/10), Hill (1/6), Lincecum (1/6), Young (1/6), Blanton (1/4)
*If no QO
On the RP side, Broxton, Kelley, Madson and Lowe look particularly appealing.