Never heard of Avon tires before, but it seems that they have good reviews. Either way, Motorcycle Superstore has what could be a good sale on some models now.
Avon just came out with 3 new styles of sportbike tires - the 3D Ultra Sport, The 3D Ultra Supersport and the 3D Ultra Extreme.
The street oriented 3D Ultra Sport is going for $130 for a set with free shipping
As I said no idea if they are good or not (someone may chime in with more info on them) but reviews look favorable