I haven't owned all of them either and unless you buy all three and a/b/c them with the same source material, you will more than likely be thrilled with any of the three. That said, I've owned quite a bit and the Marantz I used for a while had a more pleasing sound (music) to my ear and was much closer to the sound of my big Sansui, which I love. You won't go wrong no matter what you choose, just make sure you're getting the functionality that you want.
As far as looks go it would not be terribly hard to make them look better if it's a problem. Make some simple frames 3, one for the 402 horn and 2 for the openings of the bass bin. I asked my wife months after setting our speakers up if she wanted grills on everything and she said no I like the way it looks. So I never did anything but plan to. I want to make some red oak frames to go around the 402 horn. It would match the mwm bass bins, no grill cloth just a frame I think it would look good. It would be to just border the last inch or so and go out a little as to not be to small looking. I showed the idea to Roy to do to make sure it wouldn't affect the sound and he said it was fine since it was not close to the last flair of the horn. I told him I didn't want to mess with the bubble, he looked at me surprised, I told him, see I do listen, I think he was not expecting to hear that.
Distortion could be a sign of a driver operating out of the safe zone, hence you can't discard it when you are talking about extending a driver lower than comfortable, especially beyond resonant point.