#35 is better. Yeah I think the ".de" is necessary. See, in Germany we have Domains usually with .de but .com and .net is also very common. And it's is a pure online-brand.
How about "Wald-Prinz.de" instead of "WALD-PRINZ.DE"
Can you try the "-" between Wald and Prinz in black color? Since the Domain "Waldprinz.de" is owned by somebody else, it has to be clear that the domain's name is Wald-Prinz.de