IMO I think this is a great deal. Of course I don't know who your other catcher is.
The Trout owner might not do it though, I have been targeting him in my league (keeper which is a little different) and he just won't budge. Right now the kid is on fire and even a good offer might not be enough. The 'injury' news for Cespedes, while not enough to keep him out, might lower that value just a little bit on him. Hopefully the Trout owner is in need of catching help.
Please help here if you don't mind: http://goo.gl/LaKuS