you don't have "account classic" but "NCsoft account" and you can log live/classic/aden servers!
if you buy the pack for aden this will be JUST for ADEN SERVER, if you buy pack for classic it will be JUST for CLASSIC SERVER and the same for LIVE
don't need a new account. just buy and the day of opening you will get the starter pack. but, you can't log on aden/classic with the same time, you can play with you main on classic and on aden you can log with new account.