My main is a tailor with plenty of Imperial Silk and my shadow priest is about to reach level 90. My question is which set of gear is best for shadow.

http://www.wowhead.com/item=82438
http://www.wowhead.com/item=82437

or

http://www.wowhead.com/item=82439
http://www.wowhead.com/item=82440

thanks for any help you guys can lend me.