I also use Hunter boots and have for decades- the hills up here are even soggier than Dartmoor. Currently mine are 12 inches high and that means I approach all but deep rivers with equanimity. They are Harkila which are about the same price range as Lowa Hunter but they have really light soles and lower parts which give the impression of wearing trainers. The uppers are leather. I’ve had them three years and apart from after crossing over-deep rivers in pursuit of DD caches ( both here and on Dartmoor), not had a wet foot.
The achilles heel of Hunting boots is the heel- the leather tends to bend and then crack there. Keep that part of the boot very well “dubbinned” for longevity.