Having gone through a LOT* of trail runners, I have had the best luck with Asics Gel Trabuco (model TN7B0) Like all manufacturers, Asics has too many models and each fits a little differently. So you have to shop.

Asics are reasonably priced and are as durable as anything else and vastly superior to some. They are also lightweight. I got my last pair from RunningShoes.com for $60. What a deal!RunningWarehouse also has good prices and really good information on each model.

* I have worn out one or more pairs by these makers, in alpha order with my general satisfaction from 0 to 5, zero being useless. Satisfaction is subjective for weight, durability and performance: Asics (5), GoLite (0) (the absolutely worst shoes in the world), La Sportiva (2), Merrell (4), Montrail(4) New Balance (4), Nike (3), Saucony (5), Solomon (3), Vasque Velocity (2).