One of the breeders you list is European show lines - the other American show lines....
I would suggest researching types before you make any commitment to any breeder....the differences between types can be as wide as choosing different breeds.
If you have any interest in any sport - I would look to working lines (European)... board member Christine Kemper has working line dogs which are partially East and West German and are going to be more suitable for your stated goals. Blackthorn Kennels in VA
Csabre Sch1, Hexe Sch2, SG Bengal, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia BH ~ ATB Danger Sch1 RH SAR ~ Kougar Sch3, Kyra Sch3, Cito Sch2, Alice Sch1, Kelsey CD, Ret ~ Basha & Fenja Sch3s