Diptyques Philosykos has amazing longevity after moderate application. It was actually too much for me after the first couple of hours.
Diptyque L’eau de Tarocco was very nice -- I was not overwhelmed by oranges; it was more of a light-spicy-aromatic to me, but I suggest you test "in person" before deciding.
BTW, Iris Nobile is much more about gardenia than about iris. If you are looking for iris, test before buying to make sure this suits you.