I just wanted to say I have those boots in "grey" (not really grey, mine are more tan if you ask me), but I absolutely love them and wear them any chance I get in the fall and winter.
I bought those last year in gray on a great clearance. More of a taupe than actual gray, but that means they'll go with both gray and brown! Love, love, LOVE them! I always have trouble with boots going over my calves, even though I don't think my legs are anything out of the ordinary. These are perfect and still have room for tucking.