I don't think it's that difficult to decide. There's a lot more room between San Jose, California and Hokkaido, Japan than between Natal, Brazil and Dakar, Senegal; cutting through the Pacific makes the most sense for most applications, I think. Sure, the Bering Strait is pretty tiny, but if you break in the Atlantic you're going to get a lot of distortion in Greenland (hasn't it had enough?), mainland Europe, and Brazil.