You might be "giving up too much" to get Sabathia, but that's not necessarily the right way to look at a trade.
No matter what one of those four has to ride the bench right now, so why not use one of them to get a top 3 pitcher? Zimmerman slides into the 3B slot, and he's bound to start performing soon--he has a highly productive history.
(In reference to an Aaron Hill for David Price swap)
mpieco wrote: You're my new hero if that gets accepted.