I sampled Mona di Orio's Lux a few days ago. It started out as a perfect imitation of the cut through a fresh lemon. The top notes smelled exactly like lemon peel and was astonishingly well done and beautiful. Very deep and potent.
I have only sampled it on fabric and I did not follow the scent for too long. My impression, and after what the very trustworthy SA told me, it holds the citrus note all through the progression.
Mona di Orio studied for the legendary Edmond Roudnitska, by the way.
It is damn expensive and gets quite mixed reviews on the perfume-smellin things blog, but it is defininately worth checking out.
Link to the review:http://perfumesmellinthings.blogspot...a-di-orio.html