Wouldn't necessarily choose it myself, but I applaud anyone who goes for an interesting, not-accepted-as-the-done-thing choice. I think it could look fabulous depending on how it's put together, and I don't agree with the play it safe, be bland, you can only have one "star" feature mantra.
I would say though, that you need to make sure the undertones of the greys work together - greys can be tricky to match. Love that cooker!