I have run GB TI, Tsumara, Sugihara,Windsor, Cannon, Stihl, Oregon and Oregan made Husky bars.
Cannon are very high quality. Stihl ES and ES light bars are nearly as good. GB TI and Windsor are decent. Tsumara, Sugi and Oregon are a step bellow. Just my oppinion.
Anymore all I will buy is Stihl ES or ES light. Cannons are premium quality, but the price has gotten ridiculous IMO.
All of the laminated bars are garbage and for our Canadian friends many Stihl ES bars in CA are rebranded Oregons(at least they were when I lived there).