I'm actually a bigger fan of Hunter's Lady N style, which retail for $140, but you can find a handful of them for under $100 on eBay.
Hunter Lady N, $140
dav Equistrian, $95
Chooka Lace-Up, $79.95
Jeffrey Campbell Vee, $54.95
Melissa x Vivienne Westwood, $120
Aquatalia by Marvin K. Giggle, $207.92
Readers, if you have any other suggestions, I would love to see them!