I can talk to myself into settling any of the three. It’s very well designed to create that dilemma.
So many considerations. For example, settling in place might allow a work boat to travel east along the lakes to another city that’s coastal thus saving time. Settling on the marble enculturate, both gold, enabling settlers to settle further from the gold, and still start working them immediately. When consideration that might be important, is where additional cities will be located. Not that we know much about that right now anyway.
Why, thank-you! *blushes*