I do most of my training and racing in the Brooks Green Silence. I bought four pair when I heard Brooks was discontinuing them. Anyway, I'm racing a marathon on a crushed limestone trail and was wondering if anyone has a suggestion for a trail shoe that was be similarly light and responsive but offer better traction. I might just use the Green Silence anyway, cause it's not a technical trail, but am thinking that something with better traction might help me be faster. Thoughts?