I love orange, too, so I'll be looking at the responses with you, Iivanita.
My very favorite orange is Ozwald Boateng's Bespoke Orange. It is discontinued and impossible to find. I have about 1.5 ml in a decant that I am hanging on to because I love it so much I can't bear to part with it. Apparently, OB brought out this fragrance called Bespoke, and it had two fragrances - one side was Red, and the other was Orange. I loooove Orange.