Not to resurrect an old thread, but based on TR's pics, I slapped the Ovation Flex boots onto my amazon wishlist, and lo! my FIL got them for me for my birthday! My b-day isn't until Monday, but I could tell what they were when UPS delivered, so I opened them and am really pleased! I agree that the ankle isn't as contoured as it could, but the things are the first boots I've ever had that are actually tall enough! I am amazed and ridiculously excited! And they're slimmer than my MH boots, which is also nice.
If the only problem with the tredsteps are that they're not tall enough, you could always bring them to a shoe guy and have some leather added to the top, a friend of mine did that with black aligator leather and it looked awesome