Oh citrus scents are great! If you like orange, THE most realistic orange note I've ever smelled is in Guerlain's Mandarine Basilic. It's NOT sweetened at all. It's tart and perfect.
If you like Grapefruit then check out Hermes Eau de Pamplemousse Rose, or you can also check out their take on green mango which is their amazing fragrance Un Jardin sur Le Nil. I think Hermes is pretty much the perfect house for me. They're accessible, most are quite affordable, and Jean Claude Ellena is their in house perfumer. He's quite a minimalist, and I love that.
Oh, and while you're at it, Terre d'Hermes is their namesake men's fragrance and it's unbelievable. Voyage d'Hermes is somewhat similar, but MUCH brighter and more unisex.