Oh, I forgot.. What I meant was: I would not send it to B&H at this time. I would wait until the MKII gets easier to obtain.. Cause if it's covered by warranty, you're covered for tree years or so (don't know american warranties in great detail), and since dead-pixels can't be a "user-error", you will anyway be covered if you decide to wait half a year or so.
I would play around with my MKII now, and rather send it in for replacement after a year or so, when it starts to get scratches and such. Or even better, replace it just before you sometime in the future (maybe) sell it, and sell it as "brand new, never opened" 