If you want simple and classic, I don't think you can do much better than the 1815. I have one, and I think it is the nicest time-only watch made today.
Also, my personal opinion is that the 1815 is at its best in yellow gold. I love white metals, but I think the classic design of the 1815 just looks great in gold. If there is room for yellow gold in your collection, you might want to try that route. You just might like it better than the platinum.