Flexibility does not equal better choices
I frankly can not think of a single good reason to NOT stay in the confines of a Registry. Everyone keeps saying,"I like to be able to pick the best stallion for my mare regardless of Registry".
Here is the problem with that statement. YOU CAN'T
The ability to pick the right stallion requires that you know how that stallion breeds with mares like your own. It also requires that you know how your mare breeds, and how her blood mixes with that of stallions from a breed. If you breed your mare to a different stallion from a different studbook every year, you can not known what is coming from your mare and what is coming from the stallion. The knowledge needed to be able to make this decision comes from many breeders using the stallion on mares from a similar genetic base.
The second problem with this statement is the thinking that Hannoverian breeders, Dutch Breeders, Holsteiner Breeders in Europe are able to be the best breeders in the world using only the stallions avaible to them from their studbook, but somehow we in American have some unique situation. That somehow we have special mares that none of the stallion in the studbook they originate from are good enough. I think this notion is laughable.
So if you are a Hannoverian breeder, why did you buy mares that weren't Hannoverian? I have to "assume" they are good enough to breed, which is why you purchased them. Why didn't you purchase or breed for yourself Hannoverian Mares? It sounds like your problem is self induced.
I breed Holsteiners, because I believe them to be the best jumping horse in the world. The WBFSH supports this belief. I assume you breed Hannoverians because you believe them to be the best sport horse in the world. So why not buy Hannoverians? I purchased Holsteiner mares with breedable pedigree's. I then chose stallions from the VAST array of stallions approved to ALL Holsteiner breeders in the world. I could even choose outside stallions approved for breeding. Regardless of breed preference, I can make these decisions based on HUNDREDS of mares like my own being bred to these stallions. I can in fact choose the best stallion for my mare using KNOWLEDGE, and doing so without knowledge is reckless. To accentuate this point I supply evidence from the "Limonchello II" thread. Posters were actually stating how he bred when in 8 years he had only 38 foals. 1st many of them had not even seen a fraction of those 38 foals, or let alone their dams. SO, they in fact could NOT accurately state how he breeds, yet they were quick to do so.
Some feel registries/studbooks are restrictive, I find them to be informative. You can't believe a breed of horse, or sport horse registry is the best and then turn around and tell me that same registry doesn't have the best stallion for your mares. It just doesn't make any sense. Both can not be true.
Sorry for the rant, just my 2 cents.