During my PhD I realized the longer you can extend it, the better (if you intend to stay in academia). If you do 6 years, you'll have the experience of someone

During my PhD I realized the longer you can extend it, the better (if you intend to stay in academia). If you do 6 years, you'll have the experience of someone who has already done one post doc, but you'll have easier time applying for grants since you're judged as a fresh PhD (possibly with a CV much better than the other applicants due to your extra time).