We bought a rolling island with a marble countertop. It is great for what it is. My only complaint was that it was the display model, so it was put together crappy.
It's too late now, but I would have suggested wheels if you have a hardwood floor. We use ours as a mobile prep station because we have a serious lack of counter space.
Anyway, that looks really cool, and that tile will make it look pretty awesome. I LOVE those slide outs to increase the surface area in the one of the pictures you posted.