My bike came with the Metzlers (04’s) which I wasn't too crazy about, but I used 'em up pretty good for about 6K miles of mostly all season, superslab, commuting. I now have about 3.5K on the Avons with similar usage and I like them a lot. Stickier? Yup, without a doubt. Wet grip? Definitely better than the Metzlers. Mileage? So far seems good.
With my relatively relaxed style of riding, I can see myself getting 7K out of them and that would be OK with me. Anything more would be a bonus and I wouldn’t try to push it much more, to save a few hundred bucks. Some people have said they have gotten 10 or 11K out of them, but they might be in colder climates. (I’m in {on?} Long Island, NY.) The Avons seem to have higher profile than the OE Metzlers so the bike seems to stand better on the side stand. (This might just be my imagination, or it could be the drugs I did when I was younger.)
Apparently, the Avons aren't marked (heavy spot) from the factory and Yamaha rims are supposedly, less than ideally balanced to begin with, so these tires can be hard to balance. The guy who did them for me said "I had to balance the shit out of them."
Other than a shimmy around 45 mph if I should happen to take both hands off the bar for a second, I have no complaints. (No lectures please, sometimes I just have to use my cell phone and drink my latte at the same time.)
I think they feel “smoother” than the Metzlers too. Still, I'm curious about the Pirelli Stradas and may try them next time.
When I was in your shoes, I checked the consensus amongst the owners (at EZboard) and I believe Avons were the best overall choice for what I wanted. It seems we have few choices compared to other bikes, probably due to the weight, performance demands and relatively small market share of the FJR. Many people are down on the Metzlers 06’s. I didn’t want to have any doubts leaned over in high speed turn and other than some people burning them up in a few thousand miles, I couldn’t find any bad things said about the Avons.
Also, apparently Avon has a great warranty and customer service. Fortunately, I haven't had the chance to experience it. Hopefully I never will have to. But it‘s nice to know it‘s there and this may keep me using their tires.
I hope this helped a bit. Good luck in your search.