I agree with everyone. I think you should adopt from a shelter and www.petfinder.com always has pets that need to be adopted in almost every area you can think of.
I have a mix dog--I bought her and I know there are tons of dogs that need homes, so buying a dog isn't the best choice, but she belonged to my mom's friend who accidentally let her dogs get together and have puppies by mistake. My little girl is a maltese/pomeranian mix. So, she isn't very hyper like a schnauzer/terrier mix would be. But, I wouldn't trade her for any other dog in the world
Just make sure you do your research on any pup you decide you want, and I suggest like everyone else to adopt from a shelter. I am definitely going to adopt my next dog from one.... Mix dogs are so wonderful--I think pure bred dogs are just as great!!

I haven't ever really heard of that mix of dog either though--I'm sure they're are some schnauser mixs or terrier mixes ready to be adopted at a shelter somewhere. It might not be the same exact 2 breed mixes you want, but it will be very rewarding I know to help a little dog/puppy and give him/her a great home where they'll be loved.

Let us know what kind you get if you get one.

Genny