The Stuart Weitzman 5050 boots are very popular, but also expensive. They come in a variety of colors and finishes:
http://shop.nordstrom.com/s/st.....ot/2905315
I actually have a pair that I think I'm going to sell. They're slightly large on me, and I am not reaching for them as much these days (I prefer shorter boots on me -- "over the knee" on me barely comes halfway up my kneecap, and it's not the most flattering height on my not-so-slender legs). You're not an 8.5, are you?