One benefit of buying from Bike Friday is that the case may come already with holes drilled out. While drilling the holes may seem trivial, I ended up with many more than I wanted when trying to fit the Bike Friday system and drilling by myself. Check, though, with Bike Friday whether they provide those cases with holes. Personally, I would not bet that any case would. The bike dimensions and the airline limit make the wiggle room tight. Myself, I have a Carlton that was the pre-Samsonite favorite of Bike Friday. That Carlton is not manufactured anymore.
I bought a suitcase through them but without the trailer. There are no holes in the case.