For Shutzhund you better buy a german shepard.
They are perfect for that.
But I guess you like the CzW look, dont you?

Same problem as me.
I ended buying two females: a CzW and a GS.;-)

It depends on how deep you want to go into Defense training, you can train a CSW for that but for competitions you will be normally better of with a Mallinois or GSD.

Our advice will always be the same, visit Europe and as much breeders as possible, best places to get in contact are Club shows with specialized judges or summer camps in the countries of origin.

Regards
Ina

This thread might help you: http://www.wolfdog.org/forum/showthread.php?t=6326