My suggestion is an all leather boot, anywhere in the 6" area. My hiking is in the Smokies, in the high desert in NM/AZ/NV, and some in Washington. I've found all leather keeps the water out the best, offers more support in the ankle and protects the foot from pokes jabs and such, better than any of the leather/canvas amalgamations. If you want a more breathable option, I love my Keen Gunnisons (no longer made of course) and the Oboz Firebrand. These are lighter, trail shoes and as Tobus said, there is little help from them with the ankle.

The old Vasque Sundowner was the best all leather hiker, but since it's move to China fit and feel have changed so much me and my hiking companeros have sworn off them. A lot have gone to the Asolo TPS 520 GV or the Scarpa SL M3, bot are awesome boots but Narrow too much at the toe box for me. I wear a line only availabel at Sierra Trading Post the Alico either the Summit or the Tahoe. They are both heavy duty super tanks and fit my wide foot. Two other options I see with some frequency are the Zamberlan Panther and the Danner Mountain Lite, but have idea about their fit.