I would not entrust such a collection to check-in, although with the weight I'm not sure if they'd accept it as carry-on. Well, not with the airlines I've encountered so far anyway. YMMV. :)
Failed to pick up a RUSH x collab G-Shock just yesterday (got beat by a last second bid, must be one of those snipers). >_< Now I'm eyeing to get a pair of Evangelions that came out in 2009 (not the GA-110 ones, although I have the purple GA-110EV).