User blog comment:Emptylord/Season 3 - PBE Patch Notes/@comment-78.61.216.170-20121125201337/@comment-5490997-20121128190807

^ If you get those new items you will also get many other stats you need for tanking, so it's not like you're paying for each component separately.

The basic tank core will probably be Bulwark + Randuin's, which will give a nice amount of all stats you need to tank (armor, mres, HP, HP regen). For MS you can upgrade your boots, get Twin Shadows for more utility (it will help reveal enemies so you can initiate or ward more safely) or Shurelya's for an active that will help your whole team go in or out of a fight (which is great to make sure your team can keep up with you).

It's a loss for Singed and other high MS tanks, but overall it's not so bad. Most of them were hitting the soft cap anyway and with MS quints + masteries + the new boots you can still reach 400+ MS speeds without much trouble (on Naut with boots of Mobility and masteries/quints I can hit 460 MS and Naut is one of the slowest tanks out there, Singed should easily be able to beat that).