I can only speak to the Metz and Dunlops from recent memory. I went with a Metz on the front of the V. For me there was a great improvement in performance with the Metz up front. Tracking straight and true and it's wearing very even unlike the Dunlop.
You can hear a million people say a million things but you just have to try them out for your self........but go with the Metz
I've heard good things about avon but never tried them.
Metz. They don't follow cracks/faults in the road near as much, I believe because they do not have a central tread. They handle accurately and grip very well, wet or dry. Mileage is reported to be adequate, perhaps not the best, but frankly, with my mileage, it doesn't really matter.
I've never tried Avons, largely due to experience with the Avons that used to come standard on Land Rovers. Any company that can put crap like those on any vehicle and not commit suicide from sheer shame is not someone I would wish to put my life on
Was Avon the problem, or did Land Rover request a reengineered tire for themselves?
I used Metzlers on the Low Rider and the Street Glide as soon as I could wear out the stock Dunlops. The ride and handling was immediately improved. I put Avons on Tailgunners Springer and she loved the difference.
On the Ultra, I have switched to E3's. They are a better riding and tracking tire and I have the added benefit of getting double the mileage on the rear tire of the stock Dunlop as well as a Continental that I tried.
Back in the early 70's I ran Avon sst's on my Norton. Dunlops work great on my 85 FXEF. My ultra is in the stealer to have metzler's put on. I think the metz will be better for that heavy bike. When I was younger anything that held air was good enough for me.
with handling I always hear Metz or Avon's are better than dunlops (I don't notice a huge difference) I do prefer Metzlers though just because they seem to last longer. I've had Metzlers and Dunlops on my V and the dunlops lasted around 4k miles and my Metzlers have gone a good 4k and still have plenty of tread left.
Also I've got a friend that builds custom bikes (built my last bike) and he'll build hardtails with the fenders mounted as close to the tire as this "||" and with all other tires at high speeds they get taller and rub the fenders, but the Metzlers don't do that. He says he will never use any tire other than Metzler and I guess that has just rubbed off on me.