Even though I personally have shown Rotts for many years in both the European and American rings, in my experience, showing the breeding stock is not important to most people in the market.
I've always said our breed NEEDS more caring knowledgable breeders who "first do no harm" and health clear parents with the express intent of providing healthy, well socialized, family friendly PET puppies. That is a huge market. Puppy mills flourish and rescues are filled with genetic disasters because there simply aren't enough caring people breeding specifically for healthy pets. My answering machine holds at least 2 calls every day from people looking for a healthy pet with a great temperament, not show or working dogs.
Someone mentioned there is no such thing as "German vs American". I agree...to a point. A Rott is a Rott or a boxer is a boxer. The true difference is born in Germany or born in America, and correct by breed standard or not. Breed standard = "German" type to most people which is an incorrect assumption, at least in my breed.
Most German bred dogs are working dogs, and as such may not be "beautiful" by conformation standards because those breeders focus on working temperament, and don't care if the dog has a good head, correct coat, color or bone strength. Germany has tried to offset that trend and bring the dogs back to the breed standard by linking conformation titles to working titles. Health clearances have always been required in Europe for working titles and breeding.
A dog can't reach the highest conformation title (Seiger or Seigren) without a working title (Sch B which is the obedience portion of the working title) in addition to the hip clearance.
This is why we are we are looking at various European males for our 2010 litter and have purchased all european young stock to add to our existing lines which have combined european/american pedigrees.
Sorry so long, just another bit in info which might help someone make a decision.