BM pearl sets

Ok so I need your help


I want to buy my BM pearl sets for the wedding to wear that day


These both look nice ..but which one do u think...and this is a dumb question but is 18 inches 2 long for their necks?
http://www.overstock.com/?page=proframe&prod_id=71072
or this one
http://www.overstock.com/?page=proframe&prod_id=2171803

please help! thanks :)