dknolles

I have only bought one Fuji lens from a grey importer. It is the only lens I have had trouble with, and of course I had to pay to have it fixed. I guess that I was just unlucky but you have to ask if the cost saving is worth the risk.

I’ve ordered cameras and lenses from Hong Kong. Never had any problems with any of them, and saved loads of money. If you use PayPal you get your money back should the delivery fail to arrive.
 
 
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For your trip I think the 12mm is an excellent choice. Should be able to get some wonderful aurora shots (or astro in general). If that's a big goal for you while there, it's a great investment given the price.

Yeah, what about the 18mm f/2 ? It's small and the quality is decent. For northern lights, you might need something wide, 35 or 50 won't be very comfortable...
 
If you're into landscape photography too, the Samyang 12mm f/2 is an awesome and cheap lens as well. It outperforms all Fuji lenses for astrophotography as well.
 
Otherwise, I agree with the others : the 35mm is a great little lens, but too close to the 27mm. The 50mm is a better option as a complement lens.

I’d go for the 18mm f2 for when you want to go wider, and the 50mm f2 for when you want to go longer.
 
 
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35mm is very close to 27mm, so I'd choose 50/2

I think, in terms of offering something different, 50/2 will be better partner for 27.
Because 35/2 close enough in both focal range and aperture values - then why to keep in bag 2 similar lenses.

Personally, I prefer the f/1.4 versions of Fuji's primes, but if the f/2 is more in line with your budget and you find the weather resistance reassuring you won't be disappointed. For me, I don't really compare the focal length of the 27mm to the other lenses in my collection when I'm deciding what to pack for a trip or purchase. Among my lenses, I consider the 27mm to be a specialty lens. I use it when I want to keep a low-profile for street photography or when I want the smallest possible camera. It is a great lens, but my most used lenses are the 23mm and 35mm and it doesn't bother me at all that the 27mm is so close in focal length, especially with how small and light the 27mm is. I think there is a lot of value in owning all three.
 
If you're looking for something to shoot a lot of portraits with, then I would go for the 50mm. If you want something that has a little more versatility, the 35mm is a good choice, but it is pretty close in focal length to the 27mm. As I stated above, that doesn't bother me, but I know it's an important consideration for some people. Also, if you like to do portraits that show a bit of the environment around the subject, then the 35mm is a good choice.