Outside of the root community here, my guess is RAZR will outsell the Nexus. It's Moto with the Droid AND Razr branding. That thing should sell like mad for VZW.
I've also considered "renting" the RAZR. I'd rather avoid the restocking fee, but I suppose if the Nexus is delayed the return policy lets me pull the trigger on the RAZR. More than likely I'd end-up keeping it. I do also want to check out the Rezound, though.