Off-shore is not automatically inferior. Rubber compounding is a known science, and the quality of tires can be affected by a lot of variables.
You may want to consider looking at Yokohama's Avid Ascend series. These tires are compounded using Orange oil, resulting in better grip, lower rolling resistance (increased fuel mileage), and longer wear. If these qualities appeal to you, it may be worth the slight extra cost. I think currently they're only available in 15/16/17 inch sizes.
Ed (N4RWU) & Becky Taylor
Mistie (Walks 4-down)