I have the Marantz bag... its not bad, not that great either, but it will do a good job protecting the 671. If you had the right kind of case for your mics, they might fit in the pocket too. Right now I've got the 671, External Battery (wall mart kind)/Cable and a Digi Cable in mine. There's plenty of room for another battery too. Its much cheaper then the portabrace one too.
Rick