It may be worth trying Fleur d'Oranger's close cousin within the line, Mandarine Mandarin. It's thicker and more oriental, with a peculiar immortelle-celery accord in the base with some amber, and a curious pithy orange note in the top, with a similar floral accord borrowed from Fleurs d'Oranger.
For a completely different interpretation of orange blossom, there's always Vero Profumo's Rubj. Very soapy, musky, bright orange blossom; quite different from Fleurs d'Orangers warm, rich, spicy version but actually quite a bit more intense ( as befits a parfum ). It lasts forever on me.
For a neroli fragrance, I was recently quite taken by APOM pour Femme by Francis Kurkdjian. There's something incredibly attractive about the top notes. I can't imagine a better orange-blossom for summer.
I will also mention - as I always do when Tom Ford's Neroli Portofino has been mention up-thread - Comme des Garcons Anbar. The Tom Ford has a slightly headier neroli note to start, but I find they essentially dry down to be the same fragrance, and Anbar is by far the more affordable one.