Which ones would you recommend are the best to test from the Dior line? I already know I want to test Ambre Nuit and Cuir Cannage.
Ambre Nuit, definitely.
Cuir Cannage is wonderful and one of the less heralded of the line. Unfortunately, though, US distribution of it was pulled about a year and a half ago, so it will be hard to find even to simply test. Any stores that happen to have it now only have it because it's old stock. Once what is in US stores is gone, it's gone, and the only way you'll get it is if you get it from abroad. That's a big reason why I bought mine last November. It was one of the few bottles left in all of Saks' inventory.
The next two that I think are worth checking out are Oud Ispahan and Feve Delicieuse. Oud Ispahan is a great oud and rose and it's not an offensive oud by any means. Feve Delicieuse is awesome: spicy tonka bean. I originally thought it was too sweet, but it wears very well and has enough spice to it to temper the sweetness. I'm afraid that if another fragrance is pulled from the US market, it will be Feve Delicieuse.
Leather Oud and Patchouli Imperial are also worth checking out, though both have been pulled from the US market this year. You might still find them in stores. Leather Oud is perhaps the most challenging of the line, and a lot of people find it to be way too difficult. Honestly, it grosses out a lot of people. I think it's not bad, though. Patchouli Imperial is very nice and not at all a dirty, hippy patchouli.
I would also look at New Look 1947, Gris Dior, and Grand Bal (I did hear Grand Bal might have been discontinued).
Those are all older fragrances from the line. The newer ones are nice, but they're very sheer and light, and a lot of the people who have been fans of the line have been very disappointed by them. Sheer and light fragrances seem to be a trend right now--perhaps driven by the Asian market--and it's fine if Dior wants to make more of them. I just wish they weren't pulling the older ones and keeping them limited to overseas. The newer fragrances to the line also seem to be a lot safer, which is too bad, because the line was so much better when Dior was being bolder. So few of the new fragrances to their exclusive line have much distinction, and they keep putting out different versions of Sauvage, which is completely disgusting.
If you go overseas, I'd suggest you check out Mitzah, Eau Noire, Vetiver, Granville, and Santal Noir. The first four are only available in Paris. I have a tiny, tiny bit of Mitzah, and it's so hard to get that I'm afraid to wear it. EVERYONE seems to love that one, though.