From the land we can see, I think the original starting spot is the best. Even with those FP, I don't think we want a capital with only one food resource. The settler-first plan seems cool; I have never done that before so I'd like to see how it works out.
Edit: Also, I was going to say that working a FP would be the same as a 3H hill for a settler but then I checked and I didn't realize that the IMP bonus only applies to actual hammers, not converted food "production". Nonetheless, a forested plain (2h1f) is only slightly worse than a pure 3h, which we'll get after 8 turns with a border pop anyways. The difference between 2h1f for 8 turns then 3h vs. a full 3h build will be two turns on the settler production. Every turn counts, but its not a huge loss, and I think its worth a 2-food BFC to miss the 3H tile for the first 8 turns of our settler build.