Robby, I have SG-10s. I'm an 8.5 to 9 street shoe, bought the 9 SG-10. Its just a hair big but with a thick sock its fine. My feet are really wide though and I think the 8 would have been too small. The boots are physically a bit chunky in any size and need some getting used to with all the plastic, compared to AStars. Great protection though, especially for rock hopping. I blackened my toes several times over the years with AStars.
Also, they tend to chew the crap out of the front of the airbox. I'd add some of that grip tape.
So, depending on your foot width, I'd say the 11. If at all possible try and find a pair to try on first.