My favorites are Enlevement au serail (fruity chypre) and Promesse de l'aube (fuzzy floral chypre). La Belle Helene has a striking and very sweet pear top note, though I'm not sure I'd like wearing it. I have not tried Chypre Palatin, which sounds interesting. But, in general, they're all worthy.
I was thinking of this same question just the other day when ordering samples to go with an online perfume order. I went with Chypre Palatin and Enlevement au Serail. Really looking forward to trying them without having to go to that awful bit of Harrod's.