Like it was discussed before, we don't really know which ones specifically should be dismantled. But if it's not needed get rid of it. I find it hard to believe we need 1500+ weapons. If the Russians want to stockpile more who cares.
As fore needing the right weapon at the right place at the right time... Perhaps the right weapon is not a nuclear weapon. Most of the nations that we point them at are so centralized in their line of command that by the time the get the ok from the top to launch, their launch facility isn't there anymore.