I thought I'd resurrect this thread in case others (like me) are searching for good boots for dog-walking etc and would like an update. Having had a pair of Toggi Dubarry lookalikes for about 4 years, they've finally started leaking so I've been searching for a replacement. I originally lusted after the Dubarry Galway but couldn't justify the cost, which I then regretted, as the Toggis never looked as good and they didn't give me the foot suuport I need as I find them quite baggy around the ankle - very easy to lose a boot if you find a patch of sticky/sucky mud! With hindsight I think it's a good job I didn't get the Dubarrys as I think that any slip-in boot will be too loose around the ankle for me as they need to be wider to be able to get your foot in, and even the Dubarrys get a bit baggy. With that in mind I decided to get a pair of lace-up boots with zips and Ariat offer a few - I looked at the Grasmere, Coniston and Berwick. Initially I thought that the Grasmere would be perfect, but decided that the sole looked as if it would be a bit too slippy for dog-walking knee-high in mud - they're more designed for riding than walking, I think. Ditto the Coniston (and I think the suede will start to look manky if I go through a lot of mud); then I found the Berwick, which has more of a walking-boot type sole, is lace-up with zips up the back and has Goretex lining. Oh, and is even more expensive than the Dubarry 
... I managed to find them on-line for £279, which hurt a bit but I'm hoping they'll last a LOOOOONG time.
First impressions - they're LOOOOOOVELY. Stroke, stroke, sniff, sniff, place them on the dressing table to admire them...Also v comfy, I managed to get them on without needing to loosen the laces but I'll adjust them next time I wear them I think. They came with boot trees and a boot horn, which is great. I'm 5'6'' so by no means short, and I'm pretty long in the leg (31-32'' inside leg) and I find that these are VERY tall, so ideal for taller girls, not so much for littler ladies. They do actually catch me on the back of the knee a little bit, but not so much that they're uncomfortable; I think I could still ride in them, and I expect they'll drop down a bit with use. They're not cut away at the back of the knee at all (unlike the Coniston). My only reservation so far is that the full waterproof inner "boot" bit only comes up to the ankle and I'm a bit concerned that I'll end up getting wet feet if I wade through muddy/waterlogged fields because the zip and laces combination won't be sufficient, but we'll see. I went through a pretty flooded field yesterday and remained dry and toasty, so fingers crossed they'll do the job. Oh, and they look AWESOME - so nice not to be one of the Dubarry clones 
I can say that becuse I've spent 5 years being a Dubarry clone wannabe...