I run the 240/55 Bridgestone Exedra Max on the rear and the 150/80 Bridgestone Exedra G701 on the front. Both are radials. The G701 was the OEM front tire on some year of Gold Wing. It is only rated to 130MPH, but since I rarely hit 130MPH for any length of time, I didn't mind. I have been over 130 a time or two with no issues. I put these tires on at about 63K miles and have 74K miles on my bike now and the tires still have plenty of tread life left.
This combination of Brigestones is $100's less than the Avons. The Avons are really good looking, stick well and have good life. Avon's did have a bad batch a while back where several of us busted the radial cords in the rear tire, causing the belts to seperate. The Bridgestones handle just as well and cost WAY less. I've had nothing good to say about the Metzelers, the rear always tended to square off early and the front always tended to cup.