Definitely worth a discussion. One of my favorite forum denizens/mods Kttykat took multiple cats with her, and she posted a great thread guiding others on bringing kitties over from the US
I will be doing the same with my one kitty. It was a tough choice -- the trip I'm sure will be hard on her, but she's reasonably young (4 years old) so I think her chances are good of making it over relatively unscathed. I started crate training her as soon as I knew I was going to move over there. It's a tough choice, though - it is not an easy trip for any of us, human or pet.