Look at the LOWA boot, they have a half boot ankle fit in black, looks chunky but very light expensive but endures longer than the magnum and won't split on the heel. Foot specialists recommend this boot to soldiers with ankle problems.
I love my Lowa Boots, have had them for years and very very comfy when spending many hours on your feet. Nice and warm for winter as well.. Bit pricey, but well worth it!