Yup, 2 will get you plenty of flow. I know you said not looking for controllables, but for the cost of just one of those Tunzes, you could get 2 WP40s, and it would be more flow than what you've listed. Something to think about.
I would go with the Sicce Voyager pumps. They are extremely quiet and Italian made with a 5 year warrantee. They'll provide enough flow for your tank. Great prices too. I have had zero problems with mine for a couple of years.