This would boil down to if I was going to be getting the Japanese version or not, which sadly I'm going to be passing on, this time. (one of the reasons being, I don't have a Japanese 3DS, and would miss out on the additions that come with BW2's release) But were I actually going for the Japanese version, I would be going for Black 2, since I pre-ordered White from Play Asia.
But since I'm going to 'patiently' wait for the European release, which is probably a bad idea, since there isn't a set release date, yet... I'm going to be getting both games. I've gotten both games since Generation IV, and managed to backdate my collection to all of the Generation III games as well, but that wasn't until a while after I'd started keeping up with Generation IV.
I just hope my jobless self can keep up with the cost, lol...