Regarding server option 10, I would treat this server with care. Since it's the one recommended for EU players, it will probably soon be full enough for us to move to, especially if we plan on moving all together.
Eu players might not be enough to scale with japanese and american zones, but if they gather up in one single server, it will be definetly enough to fill it up.
Also, I personally would love to be in a server where there are players all the time, not language based or time zone based. But that's just me, as I've experienced to be able to play with most on different schedules. it's just awesome to play with people from all around the globe ;D