going to depend on your usage...many people are against anything less then "race" oriented....
if you are looking for a sport touring tire...Avon has one of the very best. Do a little googling for bikes sites that discuss the particular type of riding you do most.
If all the people that advised against Avon actually bought and tried the Avons....I think there would be less negativity...and their tires would be cheaper cause of the numbers sold.
Climate, location, riding habits and personal riding style, play a factor in tire choice.
My next sport touring tires (unless there are some rediculously low priced alternatives) will the the Azaros
AV45-ST AV46-ST
If race type grip performance is your style, then try the Viper series...
AV61 AV62
Let us know the verdict.