It's generally best practice to connect localized versions of your site with links in the header rather than redirects of any kind. Redirects tell search engines that only one of the pages should be indexed. A link indicates that both pages are important, and both should be indexed. My guess is that you'd like to have the English version of your site rank in America, and the Dutch version of your site rank in the Netherlands.
If you're worried that visitors will come to your site and get lost because there's just a small link in the header, you could create a pop up that says something like, "I see you're in the Netherlands, want to see our Dutch site?"
As an added bonus, when your American customers visit the Netherlands, they'll still be able to visit the American version of your site, since it's their choice.