What I meant was that after making the Rogue the account was filled. I will most likely add a Warrior at some point and quite possibly a few more banking chars, so I need another account for extra character slots.
The reason I would prefer moving one of the 70's is that it would allow me to dual-box two of my 70's at once, which could be pretty nice when farming battlegrounds, for instance. It would also allow me to powerlevel the possible Warrior alt in the future, plus the Paladin and Shaman that I already have.

Sorry for the confusion.