I use Metzlers , even with their sky high prices they make a Harley ride like a motorcycle should, no wondering in curves no following rain or tire groves. and 3-4 times the mileage of Dumflops.
Avon make a real good tire but they are softer, which just means they hold a curve a little better but they also wear-out much quicker then Metzler ME880s.
Also seams funny to me that All Harleys leave the factory wearing Dumbflops and Michelin is the only other tire blessed by the MOCO, but the - All Harley Drag Racing Association - is sponsored by Metzler tires. Even the Top Fuel bike run Metzler front tires with mostly Goodyear rear slicks.