I forget, which one is the N winder? I have two types of winder for my stuff, one takes a 2cr battery and one takes 6 AA batteries. The one that takes the 2cr battery is much more quiet because of the slower speed and belt drive, it is also much lighter. However it does not like my Super very much as it has trouble determining if the camera is wound when you first turn it on. If the camera was wound and you make an exposure, then it knows what to do. This gets to be a real hassle when you change to a fresh roll and want to wind it to the first frame.
The one that takes the 6 AA batteries works great except for the extra weight and noise. Not as loud as the older winder for the 1000s, but still pretty loud. Works fine with NiMH batteries.
If you are determined to get a winder, try and get the one that has the electronic cable for the leaf shutter lenses, as well as the screw in cable release socket. That way you can avoid needing the separate cable release adapter. I've often wondered if the thumb winder for the 645E would work with the Super and Pro bodies that I have. That might be a nice option for a grip and quiet winder.